diff --git a/examples/debian.yml b/examples/debian.yml
index b01ba9d..cd89727 100644
--- a/examples/debian.yml
+++ b/examples/debian.yml
@@ -12,6 +12,7 @@ systems:
     params:
     - apt
     - upgrade
+    yes: -y
     current_dir: null
     env: {}
 - install:
diff --git a/src/command.rs b/src/command.rs
index da48fbf..7cfeff5 100644
--- a/src/command.rs
+++ b/src/command.rs
@@ -69,19 +69,18 @@ impl Updater {
             .unwrap();
     }
 
-    pub fn parse_config(opt: &Opt) -> Result<Updater> {
+    pub fn from_config(opt: &Opt) -> Result<Updater> {
         // let u = Updater::new();
         // u.write_config(opt);
 
         let file = std::fs::read_to_string(&opt.config_file).unwrap();
         Ok(serde_yaml::from_str(&file).unwrap())
-        // TODO:
     }
 
-    pub fn update_all(&self) -> Result<()> {
+    pub fn update_all(&self, opt: &Opt) -> Result<()> {
         let mut errors = vec![];
         for sys in &self.systems {
-            if let Err(err) = self.update(sys) {
+            if let Err(err) = self.update(sys, opt) {
                 eprintln!("Error catched {}", err);
                 errors.push(err);
             }
@@ -98,15 +97,15 @@ impl Updater {
         }
     }
 
-    fn update(&self, sys: &System) -> Result<()> {
+    fn update(&self, sys: &System, opt: &Opt) -> Result<()> {
         if self.steps == UpdateSteps::Fetch {
-            sys.fetch()?;
+            sys.fetch(opt)?;
         }
         if self.steps == UpdateSteps::Compile {
-            sys.compile()?;
+            sys.compile(opt)?;
         }
         if self.steps == UpdateSteps::Install {
-            sys.install()?;
+            sys.install(opt)?;
         }
 
         Ok(())
@@ -114,22 +113,22 @@ impl Updater {
 }
 
 impl System {
-    pub fn fetch(&self) -> Result<()> {
+    pub fn fetch(&self, opt: &Opt) -> Result<()> {
         if let Some(fetch) = &self.fetch {
-            fetch.execute()?;
+            fetch.execute(opt)?;
         }
         Ok(())
     }
 
-    pub fn compile(&self) -> Result<()> {
+    pub fn compile(&self, opt: &Opt) -> Result<()> {
         if let Some(compile) = &self.compile {
-            compile.execute()?;
+            compile.execute(opt)?;
         }
         Ok(())
     }
 
-    pub fn install(&self) -> Result<()> {
-        self.install.execute()?;
+    pub fn install(&self, opt: &Opt) -> Result<()> {
+        self.install.execute(opt)?;
         Ok(())
     }
 }
@@ -144,7 +143,7 @@ impl Cmd {
         }
     }
 
-    fn execute(&self) -> Result<()> {
+    fn execute(&self, opt: &Opt) -> Result<()> {
         let mut cmd = Command::new(&self.exe);
         cmd.args(&self.params)
             .env_clear()
@@ -158,15 +157,18 @@ impl Cmd {
             cmd.current_dir(std::fs::canonicalize(cdir).unwrap());
         }
 
-        let confirm = "[Y/n]? ";
+        let confirm = if opt.yes { "\n" } else { "[Y/n]? " };
 
         print!("Will execute {}{}", self, confirm);
         stdout().flush().unwrap();
 
         let mut yes_no = String::new();
-        std::io::stdin()
-            .read_line(&mut yes_no)
-            .expect("Unable to read user’s input");
+
+        if !opt.yes {
+            std::io::stdin()
+                .read_line(&mut yes_no)
+                .expect("Unable to read user’s input");
+        }
 
         if !yes_no.to_lowercase().starts_with('n') {
             if cmd.status().unwrap().success() {
diff --git a/src/lib.rs b/src/lib.rs
index 8bdb826..0665b34 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,10 +22,14 @@ pub struct Opt {
     //
     //#[arg(default_value_t = PathBuf::from("examples/debian.yml"))]
     pub config_file: PathBuf,
+
+    #[arg(short)]
+    pub yes: bool,
+    //pub quiet: bool, // imply yes
 }
 
 pub fn run(opt: &Opt) {
-    let updater = Updater::parse_config(opt).unwrap();
+    let updater = Updater::from_config(opt).unwrap();
 
-    dbg!(updater).update_all().unwrap();
+    updater.update_all(opt).unwrap();
 }