diff --git a/src/command_runner.rs b/src/command_runner.rs
index 0b17ad0..b4e0956 100644
--- a/src/command_runner.rs
+++ b/src/command_runner.rs
@@ -106,7 +106,7 @@ impl<'a> TempSetEnv<'a> {
   }
 }
 
-impl<'a> Drop for TempSetEnv<'a> {
+impl Drop for TempSetEnv<'_> {
   fn drop(&mut self) {
     match self.old_value {
       Some(ref val) => env::set_var(self.name, val),
@@ -115,7 +115,7 @@ impl<'a> Drop for TempSetEnv<'a> {
   }
 }
 
-impl<'a, U: AsRef<str>, C: CommandRunner> CommandRunner for SetuidCommandRunner<'a, U, C> {
+impl<U: AsRef<str>, C: CommandRunner> CommandRunner for SetuidCommandRunner<'_, U, C> {
   fn run_with_args_and_stdin(
     &self,
     program: &str,
@@ -125,8 +125,8 @@ impl<'a, U: AsRef<str>, C: CommandRunner> CommandRunner for SetuidCommandRunner<
     let uid = get_user_by_name(self.user_name.as_ref())
       .expect("User does not exist")
       .uid();
-    let set_home = TempSetEnv::new("HOME", format!("/home/{}", self.user_name.as_ref()));
-    let set_dbus = TempSetEnv::new("XDG_RUNTIME_DIR", format!("/run/user/{}", uid));
+    let _set_home = TempSetEnv::new("HOME", format!("/home/{}", self.user_name.as_ref()));
+    let _set_dbus = TempSetEnv::new("XDG_RUNTIME_DIR", format!("/run/user/{}", uid));
     //println!("{} {:?}", program, args);
     let mut child = Command::new(program)
       .args(args)
diff --git a/src/factory.rs b/src/factory.rs
index 71aabfc..e529c44 100644
--- a/src/factory.rs
+++ b/src/factory.rs
@@ -21,7 +21,7 @@ pub struct Factory {}
 
 impl Factory {
   pub fn new() -> Self {
-    Default::default()
+    Self::default()
   }
 
   pub fn get_repo<'a, CR: CommandRunner>(
@@ -87,15 +87,15 @@ impl<'a, C: CommandRunner> SymbolRepository<'a>
               matches[1].to_string(),
               self.command_runner,
             )),
-          ])) as Box<dyn Symbol>
+          ]))
         } else if let Some(matches) = self.home.captures(value) {
           Box::new(User::new(
             matches[1].to_string().into(),
             self.command_runner,
             &self.user_adder,
-          )) as Box<dyn Symbol>
+          ))
         } else {
-          Box::new(Dir::new(value.to_string())) as Box<dyn Symbol>
+          Box::new(Dir::new(value.to_string()))
         })
       }
       "file" => {
@@ -104,17 +104,17 @@ impl<'a, C: CommandRunner> SymbolRepository<'a>
           Some(Box::new(TlsCsr::new(
             matches[1].to_string().into(),
             self.command_runner,
-          )) as Box<dyn Symbol>)
+          )))
         } else if let Some(matches) = self.private_key.captures(value) {
           Some(Box::new(TlsKey::new(
             matches[1].to_string().into(),
             self.command_runner,
-          )) as Box<dyn Symbol>)
+          )))
         } else if let Some(matches) = self.systemd_linger.captures(value) {
           Some(Box::new(SystemdUserSession::new(
             matches[1].to_string(),
             self.command_runner,
-          )) as Box<dyn Symbol>)
+          )))
         } else {
           None
         }
diff --git a/src/lib.rs b/src/lib.rs
index dcc5a68..57ed75b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,23 +1,29 @@
-// rustfmt
-
 #![deny(
+  macro_use_extern_crate,
+  meta_variable_misuse,
+  non_ascii_idents,
   trivial_numeric_casts,
+  unused,
+  unreachable_pub,
   unsafe_code,
   unstable_features,
-  unused_extern_crates,
-  unused_import_braces,
-  unused_qualifications,
   variant_size_differences,
-  clippy::use_self
+  rust_2018_idioms,
+  future_incompatible,
+  clippy::cargo,
+  clippy::nursery,
+  clippy::pedantic
 )]
-#![warn(unused_results)]
-/*
-#![warn(missing_docs, trivial_casts,
-missing_copy_implementations,
-missing_debug_implementations
+#![allow(
+  single_use_lifetimes,
+  trivial_casts,
+  clippy::module_name_repetitions,
+  clippy::cargo_common_metadata,
+  rustdoc,
+  missing_docs,
+  missing_copy_implementations,
+  missing_debug_implementations
 )]
-*/
-#![allow(box_pointers)]
 
 #[macro_use]
 mod for_each_tuple;
diff --git a/src/loggers.rs b/src/loggers.rs
index 0569c28..71b928f 100644
--- a/src/loggers.rs
+++ b/src/loggers.rs
@@ -27,7 +27,7 @@ impl<'a> FilteringLogger<'a> {
   }
 }
 
-impl<'a> Logger for FilteringLogger<'a> {
+impl Logger for FilteringLogger<'_> {
   fn debug(&mut self, _str: &str) {}
   fn write(&mut self, str: &str) {
     self.logger.write(str)
diff --git a/src/schema.rs b/src/schema.rs
index 7f12f9c..9fe811c 100644
--- a/src/schema.rs
+++ b/src/schema.rs
@@ -15,14 +15,14 @@ pub enum SymbolRunError {
 impl Error for SymbolRunError {
   fn description(&self) -> &str {
     match self {
-      SymbolRunError::Symbol(_) => "Symbol execution error",
-      SymbolRunError::ExecuteDidNotReach(_) => "Target not reached after executing symbol",
+      Self::Symbol(_) => "Symbol execution error",
+      Self::ExecuteDidNotReach(_) => "Target not reached after executing symbol",
     }
   }
   fn cause(&self) -> Option<&dyn Error> {
     match self {
-      SymbolRunError::Symbol(ref e) => Some(&**e),
-      SymbolRunError::ExecuteDidNotReach(_) => None,
+      Self::Symbol(ref e) => Some(&**e),
+      Self::ExecuteDidNotReach(_) => None,
     }
   }
 }
@@ -30,8 +30,8 @@ impl Error for SymbolRunError {
 impl fmt::Display for SymbolRunError {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     match self {
-      SymbolRunError::Symbol(ref e) => write!(f, "{}", e),
-      SymbolRunError::ExecuteDidNotReach(_) => write!(f, "{}", self.description()),
+      Self::Symbol(ref e) => write!(f, "{}", e),
+      Self::ExecuteDidNotReach(_) => write!(f, "{}", self.description()),
     }
   }
 }
@@ -119,13 +119,10 @@ where
     let mut logger = self.1.borrow_mut();
     logger.debug(format!("Running symbol {}", symbol).as_str());
     let res = self.0.run_symbol(symbol);
-    match res {
-      Err(ref e) => {
-        logger.write(format!("Failed on {} with {}, aborting.", symbol, e).as_str());
-      }
-      Ok(_) => {
-        logger.debug(format!("Successfully finished {}", symbol).as_str());
-      }
+    if let Err(ref e) = res {
+      logger.write(format!("Failed on {} with {}, aborting.", symbol, e).as_str())
+    } else {
+      logger.debug(format!("Successfully finished {}", symbol).as_str())
     }
     res
   }
diff --git a/src/storage.rs b/src/storage.rs
index 197884b..ea22765 100644
--- a/src/storage.rs
+++ b/src/storage.rs
@@ -13,7 +13,7 @@ pub trait Storage {
 pub struct SimpleStorage(String, String);
 
 impl SimpleStorage {
-  pub fn new(base: String, filename: String) -> Self {
+  pub const fn new(base: String, filename: String) -> Self {
     Self(base, filename)
   }
 
diff --git a/src/symbols/acme/account_key.rs b/src/symbols/acme/account_key.rs
index dc1fac4..988ee79 100644
--- a/src/symbols/acme/account_key.rs
+++ b/src/symbols/acme/account_key.rs
@@ -24,13 +24,13 @@ impl<'a, P: AsRef<Path>, C: CommandRunner> AcmeAccountKey<'a, P, C> {
   }
 }
 
-impl<'a, P: AsRef<Path>, C: CommandRunner> fmt::Display for AcmeAccountKey<'a, P, C> {
+impl<P: AsRef<Path>, C: CommandRunner> fmt::Display for AcmeAccountKey<'_, P, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "AcmeAccountKey {}", self.path.as_ref().display())
   }
 }
 
-impl<'a, P: AsRef<Path>, C: CommandRunner> Symbol for AcmeAccountKey<'a, P, C> {
+impl<P: AsRef<Path>, C: CommandRunner> Symbol for AcmeAccountKey<'_, P, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.path.as_ref().exists() {
       return Ok(false);
@@ -46,7 +46,7 @@ impl<'a, P: AsRef<Path>, C: CommandRunner> Symbol for AcmeAccountKey<'a, P, C> {
         "-text",
       ],
     )?;
-    Ok(stdout.starts_with(&format!("Private-Key: ({} bit)\n", self.get_bytes()).as_bytes()))
+    Ok(stdout.starts_with(format!("Private-Key: ({} bit)\n", self.get_bytes()).as_bytes()))
   }
 
   fn execute(&self) -> Result<(), Box<dyn Error>> {
diff --git a/src/symbols/acme/cert.rs b/src/symbols/acme/cert.rs
index cb6f22e..2af81b4 100644
--- a/src/symbols/acme/cert.rs
+++ b/src/symbols/acme/cert.rs
@@ -51,8 +51,8 @@ impl<'a, D: AsRef<str>, R: AsRef<Path>, C: CommandRunner, K: AsRef<Path>, CH: As
   }
 }
 
-impl<'a, D: AsRef<str>, R: AsRef<Path>, C: CommandRunner, K: AsRef<Path>, CH: AsRef<Path>>
-  fmt::Display for AcmeCert<'a, D, R, C, K, CH>
+impl<D: AsRef<str>, R: AsRef<Path>, C: CommandRunner, K: AsRef<Path>, CH: AsRef<Path>> fmt::Display
+  for AcmeCert<'_, D, R, C, K, CH>
 {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "AcmeCert {}", self.domain.as_ref())
@@ -61,8 +61,8 @@ impl<'a, D: AsRef<str>, R: AsRef<Path>, C: CommandRunner, K: AsRef<Path>, CH: As
 
 const DAYS_IN_SECONDS: u32 = 24 * 60 * 60;
 
-impl<'a, D: AsRef<str>, R: AsRef<Path>, C: CommandRunner, K: AsRef<Path>, CH: AsRef<Path>> Symbol
-  for AcmeCert<'a, D, R, C, K, CH>
+impl<D: AsRef<str>, R: AsRef<Path>, C: CommandRunner, K: AsRef<Path>, CH: AsRef<Path>> Symbol
+  for AcmeCert<'_, D, R, C, K, CH>
 {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.get_cert_path().exists() {
diff --git a/src/symbols/acme/chain.rs b/src/symbols/acme/chain.rs
index e9a2344..d62eb9b 100644
--- a/src/symbols/acme/chain.rs
+++ b/src/symbols/acme/chain.rs
@@ -32,9 +32,7 @@ impl<'a, D: AsRef<str>, R: AsRef<Path>, C: CommandRunner> AcmeCertChain<'a, D, R
   }
 }
 
-impl<'a, D: AsRef<str>, R: AsRef<Path>, C: CommandRunner> fmt::Display
-  for AcmeCertChain<'a, D, R, C>
-{
+impl<D: AsRef<str>, R: AsRef<Path>, C: CommandRunner> fmt::Display for AcmeCertChain<'_, D, R, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "AcmeCertChain {}", self.domain.as_ref())
   }
@@ -42,7 +40,7 @@ impl<'a, D: AsRef<str>, R: AsRef<Path>, C: CommandRunner> fmt::Display
 
 const DAYS_IN_SECONDS: u32 = 24 * 60 * 60;
 
-impl<'a, D: AsRef<str>, R: AsRef<Path>, C: CommandRunner> Symbol for AcmeCertChain<'a, D, R, C> {
+impl<D: AsRef<str>, R: AsRef<Path>, C: CommandRunner> Symbol for AcmeCertChain<'_, D, R, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.get_cert_chain_path().exists() {
       return Ok(false);
diff --git a/src/symbols/acme/mod.rs b/src/symbols/acme/mod.rs
index 477de9c..556ec82 100644
--- a/src/symbols/acme/mod.rs
+++ b/src/symbols/acme/mod.rs
@@ -41,7 +41,7 @@ impl<'a, U: Clone + AsRef<str>, H: AsRef<Path>, C: AsRef<str>, R: CommandRunner>
       acme_command_runner,
     }
   }
-  pub fn get_challenges_dir(&'a self) -> Cow<Path> {
+  pub fn get_challenges_dir(&'a self) -> Cow<'_, Path> {
     [self.home_dir.as_ref(), "challenges".as_ref()]
       .iter()
       .collect::<PathBuf>()
diff --git a/src/symbols/cron.rs b/src/symbols/cron.rs
index 492e5b4..952db93 100644
--- a/src/symbols/cron.rs
+++ b/src/symbols/cron.rs
@@ -21,7 +21,7 @@ impl<'r, U: AsRef<str>, R: CommandRunner> Cron<'r, String, U, R> {
   }
 }
 
-impl<'r, C: AsRef<str>, U: AsRef<str>, R: CommandRunner> Symbol for Cron<'r, C, U, R> {
+impl<C: AsRef<str>, U: AsRef<str>, R: CommandRunner> Symbol for Cron<'_, C, U, R> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     let tab = self
       .command_runner
@@ -53,7 +53,7 @@ impl<'r, C: AsRef<str>, U: AsRef<str>, R: CommandRunner> Symbol for Cron<'r, C,
   }
 }
 
-impl<'r, C: AsRef<str>, U: AsRef<str>, R: CommandRunner> fmt::Display for Cron<'r, C, U, R> {
+impl<C: AsRef<str>, U: AsRef<str>, R: CommandRunner> fmt::Display for Cron<'_, C, U, R> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(f, "Cron {}", self.user.as_ref())
   }
diff --git a/src/symbols/factory.rs b/src/symbols/factory.rs
index 2eb5829..69d79da 100644
--- a/src/symbols/factory.rs
+++ b/src/symbols/factory.rs
@@ -17,7 +17,7 @@ use crate::symbols::stored_directory::{StorageDirection, StoredDirectory};
 use crate::symbols::systemd::reload::ReloadService;
 use crate::symbols::systemd::user_service::UserService;
 use crate::symbols::tls::SelfSignedTlsCert;
-use crate::symbols::{Symbol, SymbolRunner};
+use crate::symbols::Symbol;
 
 pub trait Policy {
   fn user_name_for_host(&self, host_name: &'static str) -> String {
@@ -29,7 +29,7 @@ pub trait Policy {
   fn socket_path(&self, user_name: &str, service_name: &str) -> PathBuf {
     format!("/var/tmp/{}-{}.socket", user_name, service_name).into()
   }
-  fn acme_user(&self) -> Cow<str> {
+  fn acme_user(&self) -> Cow<'_, str> {
     "acme".into()
   }
 }
@@ -38,22 +38,20 @@ pub struct DefaultPolicy;
 
 impl Policy for DefaultPolicy {}
 
-pub struct SymbolFactory<'a, C: 'a + CommandRunner, R: 'a + SymbolRunner, P: 'a + Policy> {
+pub struct SymbolFactory<'a, C: CommandRunner, P: Policy> {
   command_runner: &'a C,
   acme_factory: AcmeFactory<'a, Cow<'a, str>, PathBuf, &'a str, C>,
-  symbol_runner: &'a R,
   policy: &'a P,
 }
 
-impl<'b, C: 'b + CommandRunner, R: 'b + SymbolRunner, P: 'b + Policy> SymbolFactory<'b, C, R, P> {
-  pub fn new(command_runner: &'b C, symbol_runner: &'b R, policy: &'b P, cert: &'b str) -> Self {
+impl<'b, C: 'b + CommandRunner, P: 'b + Policy> SymbolFactory<'b, C, P> {
+  pub fn new(command_runner: &'b C, policy: &'b P, cert: &'b str) -> Self {
     let acme_user = policy.acme_user();
     let acme_home = policy.home_for_user(&acme_user);
     let acme_factory = AcmeFactory::new(acme_user, acme_home, cert, command_runner);
     SymbolFactory {
       command_runner,
       acme_factory,
-      symbol_runner,
       policy,
     }
   }
@@ -289,7 +287,7 @@ env[PATH] = /usr/local/bin:/usr/bin:/bin
       ),
       StoredDirectory::new(
         string_target,
-        data.clone(),
+        data,
         StorageDirection::Load,
         self.command_runner,
       ),
@@ -395,7 +393,7 @@ env[PATH] = /usr/local/bin:/usr/bin:/bin
     let socket_path = self.policy.socket_path(&user_name, service_name);
     self.get_nginx_acme_server(
       host_name,
-      NginxServer::new_proxy(host_name, socket_path, root_dir, self.command_runner),
+      NginxServer::new_proxy(host_name, &socket_path, root_dir, self.command_runner),
     )
   }
 
diff --git a/src/symbols/git/checkout.rs b/src/symbols/git/checkout.rs
index 27da3b6..b837061 100644
--- a/src/symbols/git/checkout.rs
+++ b/src/symbols/git/checkout.rs
@@ -27,7 +27,7 @@ impl<'a, C: CommandRunner, T: AsRef<Path>> GitCheckout<'a, C, T> {
   }
 }
 
-impl<'a, C: CommandRunner, T: AsRef<Path>> fmt::Display for GitCheckout<'a, C, T> {
+impl<C: CommandRunner, T: AsRef<Path>> fmt::Display for GitCheckout<'_, C, T> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(
       f,
@@ -39,7 +39,7 @@ impl<'a, C: CommandRunner, T: AsRef<Path>> fmt::Display for GitCheckout<'a, C, T
   }
 }
 
-impl<'a, C: CommandRunner, T: AsRef<Path>> GitCheckout<'a, C, T> {
+impl<C: CommandRunner, T: AsRef<Path>> GitCheckout<'_, C, T> {
   fn _run_in_target_repo<S: AsRef<OsStr>>(&self, args: &[S]) -> Result<Vec<u8>, Box<dyn Error>> {
     let mut new_args = vec![OsStr::new("-C"), self.target.as_ref().as_ref()];
     new_args.extend(args.iter().map(AsRef::as_ref));
@@ -47,7 +47,7 @@ impl<'a, C: CommandRunner, T: AsRef<Path>> GitCheckout<'a, C, T> {
   }
 }
 
-impl<'a, C: CommandRunner, T: AsRef<Path>> Symbol for GitCheckout<'a, C, T> {
+impl<C: CommandRunner, T: AsRef<Path>> Symbol for GitCheckout<'_, C, T> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if let Err(e) = metadata(self.target.as_ref()) {
       return if e.kind() == io::ErrorKind::NotFound {
diff --git a/src/symbols/git/submodules.rs b/src/symbols/git/submodules.rs
index bc00db1..83255d1 100644
--- a/src/symbols/git/submodules.rs
+++ b/src/symbols/git/submodules.rs
@@ -20,13 +20,13 @@ impl<'a, P: AsRef<Path>, C: CommandRunner> GitSubmodules<'a, P, C> {
   }
 }
 
-impl<'a, P: AsRef<Path>, C: CommandRunner> fmt::Display for GitSubmodules<'a, P, C> {
+impl<P: AsRef<Path>, C: CommandRunner> fmt::Display for GitSubmodules<'_, P, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "Submodules for {}", self.target.as_ref().display())
   }
 }
 
-impl<'a, P: AsRef<Path>, C: CommandRunner> GitSubmodules<'a, P, C> {
+impl<P: AsRef<Path>, C: CommandRunner> GitSubmodules<'_, P, C> {
   fn _run_in_target_repo(&self, args: &[&OsStr]) -> Result<Vec<u8>, Box<dyn Error>> {
     let mut new_args: Vec<&OsStr> = vec![];
     new_args.extend_from_slice(args!["-C", self.target.as_ref()]);
@@ -35,7 +35,7 @@ impl<'a, P: AsRef<Path>, C: CommandRunner> GitSubmodules<'a, P, C> {
   }
 }
 
-impl<'a, P: AsRef<Path>, C: CommandRunner> Symbol for GitSubmodules<'a, P, C> {
+impl<P: AsRef<Path>, C: CommandRunner> Symbol for GitSubmodules<'_, P, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.target.as_ref().exists() {
       return Ok(false);
diff --git a/src/symbols/list.rs b/src/symbols/list.rs
index 37d291b..5925971 100644
--- a/src/symbols/list.rs
+++ b/src/symbols/list.rs
@@ -14,7 +14,7 @@ impl<'a> List<'a> {
   }
 }
 
-impl<'a> Symbol for List<'a> {
+impl Symbol for List<'_> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     for symbol in &self.symbols {
       if !symbol.target_reached()? {
@@ -99,7 +99,7 @@ impl<'a> SymbolListAction<'a> {
   }
 }
 
-impl<'a> Action for SymbolListAction<'a> {
+impl Action for SymbolListAction<'_> {
   fn run(&self) -> Result<(), Box<dyn Error>> {
     for symbol in self.symbols {
       symbol.as_action(self.runner).run()?;
@@ -118,7 +118,7 @@ impl<'a> ListAction<'a> {
   }
 }
 
-impl<'a> Action for ListAction<'a> {
+impl Action for ListAction<'_> {
   fn run(&self) -> Result<(), Box<dyn Error>> {
     for action in &self.actions {
       action.run()?;
@@ -127,7 +127,7 @@ impl<'a> Action for ListAction<'a> {
   }
 }
 
-impl<'a> fmt::Display for List<'a> {
+impl fmt::Display for List<'_> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(f, "List [ ")?;
     for symbol in &self.symbols {
diff --git a/src/symbols/mariadb/database.rs b/src/symbols/mariadb/database.rs
index ec7da66..2d44165 100644
--- a/src/symbols/mariadb/database.rs
+++ b/src/symbols/mariadb/database.rs
@@ -28,15 +28,15 @@ impl<'a, D: AsRef<str>, S: AsRef<Path>, C: CommandRunner> MariaDBDatabase<'a, D,
   }
 }
 
-impl<'a, D: AsRef<str>, S: AsRef<Path>, C: CommandRunner> fmt::Display
-  for MariaDBDatabase<'a, D, S, C>
+impl<D: AsRef<str>, S: AsRef<Path>, C: CommandRunner> fmt::Display
+  for MariaDBDatabase<'_, D, S, C>
 {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "MariaDB Database {}", self.db_name.as_ref())
   }
 }
 
-impl<'a, D: AsRef<str>, S: AsRef<Path>, C: CommandRunner> Symbol for MariaDBDatabase<'a, D, S, C> {
+impl<D: AsRef<str>, S: AsRef<Path>, C: CommandRunner> Symbol for MariaDBDatabase<'_, D, S, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     Ok(
       self
diff --git a/src/symbols/mariadb/database_dump.rs b/src/symbols/mariadb/database_dump.rs
index 8d0dd2f..355ad1e 100644
--- a/src/symbols/mariadb/database_dump.rs
+++ b/src/symbols/mariadb/database_dump.rs
@@ -29,13 +29,13 @@ impl<'a, N: AsRef<str>, C: CommandRunner, S: Storage> DatabaseDump<'a, N, C, S>
   }
 }
 
-impl<'a, N: AsRef<str>, C: CommandRunner, S: Storage> fmt::Display for DatabaseDump<'a, N, C, S> {
+impl<N: AsRef<str>, C: CommandRunner, S: Storage> fmt::Display for DatabaseDump<'_, N, C, S> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "Dump MariaDB Database {}", self.db_name.as_ref())
   }
 }
 
-impl<'a, N: AsRef<str>, C: CommandRunner, S: Storage> Symbol for DatabaseDump<'a, N, C, S> {
+impl<N: AsRef<str>, C: CommandRunner, S: Storage> Symbol for DatabaseDump<'_, N, C, S> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     let dump_date = self.storage.recent_date()?;
     let modified_date = self.run_sql(&format!("select UNIX_TIMESTAMP(MAX(UPDATE_TIME)) from information_schema.tables WHERE table_schema = '{}'", self.db_name.as_ref()))?;
diff --git a/src/symbols/mariadb/user.rs b/src/symbols/mariadb/user.rs
index ee0df12..0037633 100644
--- a/src/symbols/mariadb/user.rs
+++ b/src/symbols/mariadb/user.rs
@@ -26,13 +26,13 @@ impl<'a, U: AsRef<str>, C: CommandRunner> MariaDBUser<'a, U, C> {
   }
 }
 
-impl<'a, U: AsRef<str>, C: CommandRunner> fmt::Display for MariaDBUser<'a, U, C> {
+impl<U: AsRef<str>, C: CommandRunner> fmt::Display for MariaDBUser<'_, U, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "MariaDB User {}", self.user_name.as_ref())
   }
 }
 
-impl<'a, U: AsRef<str>, C: CommandRunner> Symbol for MariaDBUser<'a, U, C> {
+impl<U: AsRef<str>, C: CommandRunner> Symbol for MariaDBUser<'_, U, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     Ok(
       self
diff --git a/src/symbols/mod.rs b/src/symbols/mod.rs
index 57f061b..8c3150f 100644
--- a/src/symbols/mod.rs
+++ b/src/symbols/mod.rs
@@ -44,7 +44,7 @@ impl<'a, S: Symbol> SymbolAction<'a, S> {
   }
 }
 
-impl<'a, S: Symbol> Action for SymbolAction<'a, S> {
+impl<S: Symbol> Action for SymbolAction<'_, S> {
   fn run(&self) -> Result<(), Box<dyn Error>> {
     self.runner.run_symbol(self.symbol)
   }
diff --git a/src/symbols/nginx/server.rs b/src/symbols/nginx/server.rs
index 5d37cb1..45c441f 100644
--- a/src/symbols/nginx/server.rs
+++ b/src/symbols/nginx/server.rs
@@ -16,7 +16,7 @@ pub enum NginxServerError<E: Error> {
 
 impl From<io::Error> for NginxServerError<io::Error> {
   fn from(err: io::Error) -> Self {
-    NginxServerError::ExecError(err)
+    Self::ExecError(err)
   }
 }
 
@@ -29,7 +29,7 @@ impl<E: Error> Error for NginxServerError<E> {
   }
   fn cause(&self) -> Option<&dyn Error> {
     match self {
-      NginxServerError::ExecError(ref e) => Some(e),
+      Self::ExecError(ref e) => Some(e),
       _ => None,
     }
   }
@@ -108,7 +108,7 @@ where
 pub struct LocalTcpSocket(usize);
 
 impl LocalTcpSocket {
-  pub fn new(x: usize) -> Self {
+  pub const fn new(x: usize) -> Self {
     Self(x)
   }
 }
@@ -130,12 +130,12 @@ impl<'a, C: CommandRunner> NginxServer<'a, C, String, PathBuf> {
         target
       ),
     );
-    NginxServer::new(domain, content, command_runner)
+    Self::new(domain, content, command_runner)
   }
 
   pub fn new_proxy<S: SocketSpec, STATIC: AsRef<Path>>(
     domain: &'a str,
-    socket_path: S,
+    socket_path: &'_ S,
     static_path: STATIC,
     command_runner: &'a C,
   ) -> Self {
@@ -163,7 +163,7 @@ location @proxy {{
         proxy_content
       ),
     );
-    NginxServer::new(domain, content, command_runner)
+    Self::new(domain, content, command_runner)
   }
 
   pub fn new_php<SOCKET: AsRef<Path>, STATIC: AsRef<Path>>(
@@ -177,7 +177,7 @@ location @proxy {{
       domain,
       &(php_server_config_snippet(socket_path, static_path) + additional_config),
     );
-    NginxServer::new(domain, content, command_runner)
+    Self::new(domain, content, command_runner)
   }
 
   pub fn new_static<S: AsRef<Path>>(
@@ -195,7 +195,7 @@ location @proxy {{
         static_path.as_ref().to_str().unwrap()
       ),
     );
-    NginxServer::new(domain, content, command_runner)
+    Self::new(domain, content, command_runner)
   }
 
   pub fn new(domain: &'a str, content: String, command_runner: &'a C) -> Self {
@@ -207,7 +207,7 @@ location @proxy {{
   }
 }
 
-impl<'a, C: CommandRunner, T: AsRef<str>, P: AsRef<Path>> Symbol for NginxServer<'a, C, T, P> {
+impl<C: CommandRunner, T: AsRef<str>, P: AsRef<Path>> Symbol for NginxServer<'_, C, T, P> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.file.target_reached()? {
       return Ok(false);
@@ -239,9 +239,7 @@ impl<'a, C: CommandRunner, T: AsRef<str>, P: AsRef<Path>> Symbol for NginxServer
   }
 }
 
-impl<'a, C: CommandRunner, T: AsRef<str>, P: AsRef<Path>> fmt::Display
-  for NginxServer<'a, C, T, P>
-{
+impl<C: CommandRunner, T: AsRef<str>, P: AsRef<Path>> fmt::Display for NginxServer<'_, C, T, P> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(f, "Nginx server config")
   }
diff --git a/src/symbols/npm.rs b/src/symbols/npm.rs
index 6df5a02..e9d79ed 100644
--- a/src/symbols/npm.rs
+++ b/src/symbols/npm.rs
@@ -19,7 +19,7 @@ impl<'a, T: AsRef<Path>, C: CommandRunner> NpmInstall<'a, T, C> {
   }
 }
 
-impl<'a, T: AsRef<Path>, C: CommandRunner> fmt::Display for NpmInstall<'a, T, C> {
+impl<T: AsRef<Path>, C: CommandRunner> fmt::Display for NpmInstall<'_, T, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(
       f,
@@ -29,7 +29,7 @@ impl<'a, T: AsRef<Path>, C: CommandRunner> fmt::Display for NpmInstall<'a, T, C>
   }
 }
 
-impl<'a, T: AsRef<Path>, C: CommandRunner> Symbol for NpmInstall<'a, T, C> {
+impl<T: AsRef<Path>, C: CommandRunner> Symbol for NpmInstall<'_, T, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.target.as_ref().exists() {
       return Ok(false);
diff --git a/src/symbols/owner.rs b/src/symbols/owner.rs
index 0b2e529..eed6b92 100644
--- a/src/symbols/owner.rs
+++ b/src/symbols/owner.rs
@@ -27,7 +27,7 @@ impl<'a, C: CommandRunner, D: AsRef<Path>, U: AsRef<str>> Owner<'a, C, D, U> {
   }
 }
 
-impl<'a, C: CommandRunner, D: AsRef<Path>, U: AsRef<str>> Symbol for Owner<'a, C, D, U> {
+impl<C: CommandRunner, D: AsRef<Path>, U: AsRef<str>> Symbol for Owner<'_, C, D, U> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !Path::new(self.path.as_ref()).exists() {
       return Ok(false);
@@ -60,7 +60,7 @@ impl<'a, C: CommandRunner, D: AsRef<Path>, U: AsRef<str>> Symbol for Owner<'a, C
   }
 }
 
-impl<'a, C: CommandRunner, D: AsRef<Path>, U: AsRef<str>> fmt::Display for Owner<'a, C, D, U> {
+impl<C: CommandRunner, D: AsRef<Path>, U: AsRef<str>> fmt::Display for Owner<'_, C, D, U> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(
       f,
diff --git a/src/symbols/postgresql/database.rs b/src/symbols/postgresql/database.rs
index d41a43b..1ef3728 100644
--- a/src/symbols/postgresql/database.rs
+++ b/src/symbols/postgresql/database.rs
@@ -28,17 +28,15 @@ impl<'a, N: AsRef<str>, S: AsRef<str>, C: CommandRunner> PostgreSQLDatabase<'a,
   }
 }
 
-impl<'a, N: AsRef<str>, S: AsRef<str>, C: CommandRunner> fmt::Display
-  for PostgreSQLDatabase<'a, N, S, C>
+impl<N: AsRef<str>, S: AsRef<str>, C: CommandRunner> fmt::Display
+  for PostgreSQLDatabase<'_, N, S, C>
 {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "PostgreSQL Database {}", self.name.as_ref())
   }
 }
 
-impl<'a, N: AsRef<str>, S: AsRef<str>, C: CommandRunner> Symbol
-  for PostgreSQLDatabase<'a, N, S, C>
-{
+impl<N: AsRef<str>, S: AsRef<str>, C: CommandRunner> Symbol for PostgreSQLDatabase<'_, N, S, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     Ok(
       self
diff --git a/src/symbols/postgresql/database_dump.rs b/src/symbols/postgresql/database_dump.rs
deleted file mode 100644
index 8d0dd2f..0000000
--- a/src/symbols/postgresql/database_dump.rs
+++ /dev/null
@@ -1,75 +0,0 @@
-use std::error::Error;
-use std::fmt;
-use std::str::FromStr;
-
-use crate::command_runner::CommandRunner;
-use crate::storage::Storage;
-use crate::symbols::{Action, OwnedSymbolAction, Symbol, SymbolAction, SymbolRunner};
-
-pub struct DatabaseDump<'a, N: AsRef<str>, C: CommandRunner, S: Storage> {
-  db_name: N,
-  storage: S,
-  command_runner: &'a C,
-}
-
-impl<'a, N: AsRef<str>, C: CommandRunner, S: Storage> DatabaseDump<'a, N, C, S> {
-  pub fn new(db_name: N, storage: S, command_runner: &'a C) -> Self {
-    DatabaseDump {
-      db_name,
-      storage,
-      command_runner,
-    }
-  }
-
-  fn run_sql(&self, sql: &str) -> Result<String, Box<dyn Error>> {
-    let b = self
-      .command_runner
-      .get_output("mariadb", args!["--skip-column-names", "-B", "-e", sql])?;
-    Ok(String::from_utf8(b)?)
-  }
-}
-
-impl<'a, N: AsRef<str>, C: CommandRunner, S: Storage> fmt::Display for DatabaseDump<'a, N, C, S> {
-  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-    write!(f, "Dump MariaDB Database {}", self.db_name.as_ref())
-  }
-}
-
-impl<'a, N: AsRef<str>, C: CommandRunner, S: Storage> Symbol for DatabaseDump<'a, N, C, S> {
-  fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
-    let dump_date = self.storage.recent_date()?;
-    let modified_date = self.run_sql(&format!("select UNIX_TIMESTAMP(MAX(UPDATE_TIME)) from information_schema.tables WHERE table_schema = '{}'", self.db_name.as_ref()))?;
-    if modified_date.trim_end() == "NULL" {
-      return Ok(false);
-    }
-    Ok(u64::from_str(modified_date.trim_end())? <= dump_date)
-  }
-
-  fn execute(&self) -> Result<(), Box<dyn Error>> {
-    self.command_runner.run_successfully(
-      "sh",
-      args![
-        "-c",
-        format!(
-          "mysqldump '{}' > {}",
-          self.db_name.as_ref(),
-          self.storage.write_filename()
-        ),
-      ],
-    )
-  }
-
-  fn as_action<'b>(&'b self, runner: &'b dyn SymbolRunner) -> Box<dyn Action + 'b> {
-    Box::new(SymbolAction::new(runner, self))
-  }
-
-  fn into_action<'b>(self: Box<Self>, runner: &'b dyn SymbolRunner) -> Box<dyn Action + 'b>
-  where
-    Self: 'b,
-  {
-    Box::new(OwnedSymbolAction::new(runner, *self))
-  }
-}
-
-#[cfg(test)]
-mod test {}
diff --git a/src/symbols/postgresql/mod.rs b/src/symbols/postgresql/mod.rs
index 4a2a535..5e80d91 100644
--- a/src/symbols/postgresql/mod.rs
+++ b/src/symbols/postgresql/mod.rs
@@ -1,5 +1,3 @@
 mod database;
-mod database_dump;
 
 pub use self::database::PostgreSQLDatabase;
-//pub use self::database_dump::PostgreSQLDump;
diff --git a/src/symbols/stored_directory.rs b/src/symbols/stored_directory.rs
index e31ba04..827e807 100644
--- a/src/symbols/stored_directory.rs
+++ b/src/symbols/stored_directory.rs
@@ -34,9 +34,7 @@ impl<'a, P: AsRef<Path>, S: Storage, C: CommandRunner> StoredDirectory<'a, P, S,
   }
 }
 
-impl<'a, P: AsRef<Path>, S: Storage, C: CommandRunner> fmt::Display
-  for StoredDirectory<'a, P, S, C>
-{
+impl<P: AsRef<Path>, S: Storage, C: CommandRunner> fmt::Display for StoredDirectory<'_, P, S, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(
       f,
@@ -47,7 +45,7 @@ impl<'a, P: AsRef<Path>, S: Storage, C: CommandRunner> fmt::Display
   }
 }
 
-impl<'a, P: AsRef<Path>, S: Storage, C: CommandRunner> Symbol for StoredDirectory<'a, P, S, C> {
+impl<P: AsRef<Path>, S: Storage, C: CommandRunner> Symbol for StoredDirectory<'_, P, S, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     let metadata = fs::metadata(self.path.as_ref());
     // Check if dir exists
diff --git a/src/symbols/systemd/reload.rs b/src/symbols/systemd/reload.rs
index 7681ddd..354385c 100644
--- a/src/symbols/systemd/reload.rs
+++ b/src/symbols/systemd/reload.rs
@@ -18,7 +18,7 @@ impl<'a, C: CommandRunner> ReloadService<'a, C> {
   }
 }
 
-impl<'a, C: CommandRunner> Symbol for ReloadService<'a, C> {
+impl<C: CommandRunner> Symbol for ReloadService<'_, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     Ok(true)
   }
@@ -41,7 +41,7 @@ impl<'a, C: CommandRunner> Symbol for ReloadService<'a, C> {
   }
 }
 
-impl<'a, C: CommandRunner> fmt::Display for ReloadService<'a, C> {
+impl<C: CommandRunner> fmt::Display for ReloadService<'_, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(f, "Reload service {}", self.service)
   }
diff --git a/src/symbols/systemd/user_service.rs b/src/symbols/systemd/user_service.rs
index b3e9359..9d9eff0 100644
--- a/src/symbols/systemd/user_service.rs
+++ b/src/symbols/systemd/user_service.rs
@@ -29,14 +29,14 @@ impl From<io::Error> for UserServiceError<io::Error> {
 impl<E: Error> Error for UserServiceError<E> {
   fn description(&self) -> &str {
     match self {
-      UserServiceError::ExecError(ref e) => e.description(),
-      UserServiceError::GenericError => "Generic error",
-      UserServiceError::ActivationFailed(_) => "Activation of service failed",
+      Self::ExecError(ref e) => e.description(),
+      Self::GenericError => "Generic error",
+      Self::ActivationFailed(_) => "Activation of service failed",
     }
   }
   fn cause(&self) -> Option<&dyn Error> {
     match self {
-      UserServiceError::ExecError(ref e) => Some(e),
+      Self::ExecError(ref e) => Some(e),
       _ => None,
     }
   }
@@ -126,9 +126,7 @@ WantedBy=default.target
   }
 }
 
-impl<'a, S: AsRef<Path>, U: AsRef<str>, C: AsRef<str>, R: CommandRunner>
-  UserService<'a, S, U, C, R>
-{
+impl<S: AsRef<Path>, U: AsRef<str>, C: AsRef<str>, R: CommandRunner> UserService<'_, S, U, C, R> {
   fn systemctl_wait_for_dbus(&self, args: &[&OsStr]) -> Result<String, Box<dyn Error>> {
     let mut tries = 5;
     loop {
@@ -176,8 +174,8 @@ impl<'a, S: AsRef<Path>, U: AsRef<str>, C: AsRef<str>, R: CommandRunner>
   }
 }
 
-impl<'a, S: AsRef<Path>, U: AsRef<str>, C: AsRef<str>, R: CommandRunner> Symbol
-  for UserService<'a, S, U, C, R>
+impl<S: AsRef<Path>, U: AsRef<str>, C: AsRef<str>, R: CommandRunner> Symbol
+  for UserService<'_, S, U, C, R>
 {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !(self.config.target_reached()?) {
@@ -226,8 +224,8 @@ impl<'a, S: AsRef<Path>, U: AsRef<str>, C: AsRef<str>, R: CommandRunner> Symbol
   }
 }
 
-impl<'a, S: AsRef<Path>, U: AsRef<str>, C: AsRef<str>, R: CommandRunner> fmt::Display
-  for UserService<'a, S, U, C, R>
+impl<S: AsRef<Path>, U: AsRef<str>, C: AsRef<str>, R: CommandRunner> fmt::Display
+  for UserService<'_, S, U, C, R>
 {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(f, "Systemd user service unit for {}", self.service_name)
diff --git a/src/symbols/systemd/user_session.rs b/src/symbols/systemd/user_session.rs
index e2dafc6..496d08e 100644
--- a/src/symbols/systemd/user_session.rs
+++ b/src/symbols/systemd/user_session.rs
@@ -14,13 +14,13 @@ pub enum SystemdUserSessionError<E: Error> {
 impl<E: Error> Error for SystemdUserSessionError<E> {
   fn description(&self) -> &str {
     match self {
-      SystemdUserSessionError::ExecError(ref e) => e.description(),
-      SystemdUserSessionError::GenericError => "Generic error",
+      Self::ExecError(ref e) => e.description(),
+      Self::GenericError => "Generic error",
     }
   }
   fn cause(&self) -> Option<&dyn Error> {
     match self {
-      SystemdUserSessionError::ExecError(ref e) => Some(e),
+      Self::ExecError(ref e) => Some(e),
       _ => None,
     }
   }
@@ -46,7 +46,7 @@ impl<'a, U: AsRef<str>, C: CommandRunner> SystemdUserSession<'a, U, C> {
   }
 }
 
-impl<'a, U: AsRef<str>, C: CommandRunner> Symbol for SystemdUserSession<'a, U, C> {
+impl<U: AsRef<str>, C: CommandRunner> Symbol for SystemdUserSession<'_, U, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     let mut path = PathBuf::from("/var/lib/systemd/linger");
     path.push(self.user_name.as_ref());
@@ -72,7 +72,7 @@ impl<'a, U: AsRef<str>, C: CommandRunner> Symbol for SystemdUserSession<'a, U, C
   }
 }
 
-impl<'a, U: AsRef<str>, C: CommandRunner> fmt::Display for SystemdUserSession<'a, U, C> {
+impl<U: AsRef<str>, C: CommandRunner> fmt::Display for SystemdUserSession<'_, U, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(f, "Systemd user session for {}", self.user_name.as_ref())
   }
diff --git a/src/symbols/tls/csr.rs b/src/symbols/tls/csr.rs
index 5e9e383..3b81566 100644
--- a/src/symbols/tls/csr.rs
+++ b/src/symbols/tls/csr.rs
@@ -30,13 +30,13 @@ impl<'a, C: CommandRunner> TlsCsr<'a, C> {
   }
 }
 
-impl<'a, C: CommandRunner> fmt::Display for TlsCsr<'a, C> {
+impl<C: CommandRunner> fmt::Display for TlsCsr<'_, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "TlsCsr {}", self.domain)
   }
 }
 
-impl<'a, C: CommandRunner> Symbol for TlsCsr<'a, C> {
+impl<C: CommandRunner> Symbol for TlsCsr<'_, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.get_csr_path().exists() {
       return Ok(false);
diff --git a/src/symbols/tls/key.rs b/src/symbols/tls/key.rs
index 9a9fad1..e819111 100644
--- a/src/symbols/tls/key.rs
+++ b/src/symbols/tls/key.rs
@@ -31,13 +31,13 @@ impl<'a, C: CommandRunner> TlsKey<'a, C> {
   }
 }
 
-impl<'a, C: CommandRunner> fmt::Display for TlsKey<'a, C> {
+impl<C: CommandRunner> fmt::Display for TlsKey<'_, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "TlsKey {}", self.domain)
   }
 }
 
-impl<'a, C: CommandRunner> Symbol for TlsKey<'a, C> {
+impl<C: CommandRunner> Symbol for TlsKey<'_, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.get_path().exists() {
       return Ok(false);
@@ -54,7 +54,7 @@ impl<'a, C: CommandRunner> Symbol for TlsKey<'a, C> {
         "-text".as_ref(),
       ],
     )?;
-    Ok(output.starts_with(&format!("Private-Key: ({} bit)\n", self.get_bytes()).as_bytes()))
+    Ok(output.starts_with(format!("Private-Key: ({} bit)\n", self.get_bytes()).as_bytes()))
   }
 
   fn execute(&self) -> Result<(), Box<dyn Error>> {
diff --git a/src/symbols/tls/self_signed_cert.rs b/src/symbols/tls/self_signed_cert.rs
index 7724330..71c0c4a 100644
--- a/src/symbols/tls/self_signed_cert.rs
+++ b/src/symbols/tls/self_signed_cert.rs
@@ -28,7 +28,7 @@ impl<'a, D: AsRef<str>, C: CommandRunner> SelfSignedTlsCert<'a, D, C> {
   }
 }
 
-impl<'a, D: AsRef<str>, C: CommandRunner> fmt::Display for SelfSignedTlsCert<'a, D, C> {
+impl<D: AsRef<str>, C: CommandRunner> fmt::Display for SelfSignedTlsCert<'_, D, C> {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     write!(f, "SelfSignedTlsCert {}", self.domain.as_ref())
   }
@@ -36,7 +36,7 @@ impl<'a, D: AsRef<str>, C: CommandRunner> fmt::Display for SelfSignedTlsCert<'a,
 
 const DAYS_IN_SECONDS: u32 = 24 * 60 * 60;
 
-impl<'a, D: AsRef<str>, C: CommandRunner> Symbol for SelfSignedTlsCert<'a, D, C> {
+impl<D: AsRef<str>, C: CommandRunner> Symbol for SelfSignedTlsCert<'_, D, C> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     if !self.get_cert_path().exists() {
       return Ok(false);
diff --git a/src/symbols/user.rs b/src/symbols/user.rs
index 3448a74..e3ca95d 100644
--- a/src/symbols/user.rs
+++ b/src/symbols/user.rs
@@ -16,14 +16,14 @@ pub enum UserAdderError {
 impl Error for UserAdderError {
   fn description(&self) -> &str {
     match self {
-      UserAdderError::AlreadyExists => "User already exists",
-      UserAdderError::UnknownError => "Unknown error",
-      UserAdderError::ImplError(_) => "User adding error",
+      Self::AlreadyExists => "User already exists",
+      Self::UnknownError => "Unknown error",
+      Self::ImplError(_) => "User adding error",
     }
   }
-  fn cause(&self) -> Option<&dyn Error> {
+  fn source(&self) -> Option<&(dyn Error + 'static)> {
     match self {
-      UserAdderError::ImplError(ref e) => Some(e.as_ref()),
+      Self::ImplError(ref e) => Some(e.as_ref()),
       _ => None,
     }
   }
@@ -31,7 +31,7 @@ impl Error for UserAdderError {
 
 impl fmt::Display for UserAdderError {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-    match self.cause() {
+    match self.source() {
       Some(e) => write!(f, "{} (cause: {})", self.description(), e),
       None => write!(f, "{}", self.description()),
     }
@@ -50,10 +50,10 @@ pub enum UserError {
 impl Error for UserError {
   fn description(&self) -> &str {
     match self {
-      UserError::GenericError => "Could not find out if user exists",
+      Self::GenericError => "Could not find out if user exists",
     }
   }
-  fn cause(&self) -> Option<&dyn Error> {
+  fn source(&self) -> Option<&(dyn Error + 'static)> {
     match self {
       _ => None,
     }
@@ -62,7 +62,7 @@ impl Error for UserError {
 
 impl fmt::Display for UserError {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-    match self.cause() {
+    match self.source() {
       Some(e) => write!(f, "{} (cause: {})", self.description(), e),
       None => write!(f, "{}", self.description()),
     }
@@ -136,7 +136,7 @@ impl<'a, C: CommandRunner> SystemUserAdder<'a, C> {
   }
 }
 
-impl<'a, C: CommandRunner> UserAdder for SystemUserAdder<'a, C> {
+impl<C: CommandRunner> UserAdder for SystemUserAdder<'_, C> {
   fn add_user(&self, user_name: &str) -> Result<(), UserAdderError> {
     let output = self.command_runner.run_with_args(
       "adduser",
@@ -152,11 +152,7 @@ impl<'a, C: CommandRunner> UserAdder for SystemUserAdder<'a, C> {
           println!("{:?}", output);
           Err(UserAdderError::AlreadyExists)
         }
-        Some(_) => {
-          println!("{:?}", output);
-          Err(UserAdderError::UnknownError)
-        }
-        None => {
+        _ => {
           println!("{:?}", output);
           Err(UserAdderError::UnknownError)
         }
diff --git a/src/symbols/wordpress/plugin.rs b/src/symbols/wordpress/plugin.rs
index 7a17deb..1bdb1c9 100644
--- a/src/symbols/wordpress/plugin.rs
+++ b/src/symbols/wordpress/plugin.rs
@@ -34,7 +34,7 @@ impl<'a, P: AsRef<Path>, N: AsRef<str>, R: CommandRunner> WordpressPlugin<'a, P,
   }
 }
 
-impl<'a, P: AsRef<Path>, N: AsRef<str>, R: CommandRunner> Symbol for WordpressPlugin<'a, P, N, R> {
+impl<P: AsRef<Path>, N: AsRef<str>, R: CommandRunner> Symbol for WordpressPlugin<'_, P, N, R> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     let base_path = self.get_path();
     if !base_path.exists() {
@@ -119,8 +119,8 @@ impl<'a, P: AsRef<Path>, N: AsRef<str>, R: CommandRunner> Symbol for WordpressPl
   }
 }
 
-impl<'a, P: AsRef<Path>, N: AsRef<str>, R: CommandRunner> fmt::Display
-  for WordpressPlugin<'a, P, N, R>
+impl<P: AsRef<Path>, N: AsRef<str>, R: CommandRunner> fmt::Display
+  for WordpressPlugin<'_, P, N, R>
 {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(f, "WordpressPlugin {}", self.name.as_ref())
diff --git a/src/symbols/wordpress/translation.rs b/src/symbols/wordpress/translation.rs
index 9876be7..ea1aea2 100644
--- a/src/symbols/wordpress/translation.rs
+++ b/src/symbols/wordpress/translation.rs
@@ -33,7 +33,7 @@ impl<'a, C: AsRef<str>, R: CommandRunner> WordpressTranslation<'a, C, PathBuf, R
   }
 }
 
-impl<'a, C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> WordpressTranslation<'a, C, D, R> {
+impl<C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> WordpressTranslation<'_, C, D, R> {
   fn get_pairs(&self) -> Vec<(String, PathBuf)> {
     let version_x = self
       .version
@@ -47,15 +47,13 @@ impl<'a, C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> WordpressTranslation<'
       locale.to_lowercase().replace('_', "-")
     };
     let mut res = vec![];
-    for &(in_slug, out_slug) in [
+    for &(in_slug, out_slug) in &[
       ("", ""),
       ("cc/", "continents-cities-"),
       ("admin/", "admin-"),
       ("admin/network/", "admin-network-"),
-    ]
-    .iter()
-    {
-      for format in ["po", "mo"].iter() {
+    ] {
+      for format in &["po", "mo"] {
         res.push((
           format!("https://translate.wordpress.org/projects/wp/{}/{}{}/default/export-translations?format={}", version_x, in_slug, path_locale, format),
           [self.path.as_ref(), format!("{}{}.{}", out_slug, self.locale.as_ref(), format).as_ref()].iter().collect()
@@ -66,9 +64,7 @@ impl<'a, C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> WordpressTranslation<'
   }
 }
 
-impl<'a, C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> Symbol
-  for WordpressTranslation<'a, C, D, R>
-{
+impl<C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> Symbol for WordpressTranslation<'_, C, D, R> {
   fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
     let mut newest = String::new();
     let match_date = Regex::new("(?m)^\"PO-Revision-Date: (.+)\\+0000\\\\n\"$").unwrap();
@@ -136,8 +132,8 @@ impl<'a, C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> Symbol
   }
 }
 
-impl<'a, C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> fmt::Display
-  for WordpressTranslation<'a, C, D, R>
+impl<C: AsRef<str>, D: AsRef<Path>, R: CommandRunner> fmt::Display
+  for WordpressTranslation<'_, C, D, R>
 {
   fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
     write!(f, "WordpressTranslation {}", self.path.as_ref().display())