diff --git a/examples/debian.yml b/examples/debian.yml
index a391f8b..01a1988 100644
--- a/examples/debian.yml
+++ b/examples/debian.yml
@@ -12,7 +12,7 @@ systems:
     params:
     - apt
     - upgrade
-    yes: -y
+    - --yes
     current_dir: null
     env: {}
 - install:
@@ -28,4 +28,3 @@ systems:
     - -a
     current_dir: null
     env: {}
-nice: null
diff --git a/src/command.rs b/src/command.rs
index 3975f2e..5922445 100644
--- a/src/command.rs
+++ b/src/command.rs
@@ -1,10 +1,10 @@
 use crate::*;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
-use std::fmt;
 use std::io::{stdout, Write};
 use std::path::PathBuf;
-use std::process::{Command, Stdio};
+use std::process::{Command, ExitStatus, Stdio};
+use std::{fmt, io};
 
 #[derive(Debug, Serialize, Deserialize, PartialEq)]
 enum UpdateSteps {
@@ -32,13 +32,12 @@ pub struct System {
 struct Cmd {
     exe: String,
     params: Vec<String>,
-    yes: Option<String>,
     current_dir: Option<PathBuf>,
     env: HashMap<String, String>,
 }
 
 #[derive(Debug, Serialize, Deserialize)]
-struct ActualCmd {
+pub(crate) struct ActualCmd {
     exe: String,
     params: Vec<String>,
     current_dir: Option<PathBuf>,
@@ -106,29 +105,13 @@ impl Updater {
         Ok(serde_yaml::from_str(&file).unwrap())
     }
 
-    pub fn update_all(&self, opt: &Opt) -> Result<()> {
-        let errors: Vec<_> = self
-            .systems
-            .iter()
-            .filter_map(|sys| {
-                if let Err(err) = self.update(sys, opt) {
-                    eprintln!("Error catched {}", err);
-                    Some(err)
-                } else {
-                    None
-                }
-            })
-            .collect();
-
-        // TODO:
-        if errors.is_empty() {
-            Ok(())
-        } else {
-            Err(Error::new(
-                errors,
-                ErrorKind::Fetch, // TODO: Why should I choose here?
-            ))
+    pub fn update_all(&self, opt: &Opt) -> Summary {
+        // self.systems.iter().collect();
+        let mut systems: Vec<_> = vec![];
+        for sys in &self.systems {
+            systems.push(self.update(&sys, opt));
         }
+        Summary { systems }
     }
 
     fn update(&self, sys: &System, opt: &Opt) -> Result<()> {
@@ -159,20 +142,26 @@ impl Updater {
 impl System {
     pub fn fetch(&self, opt: &Opt) -> Result<()> {
         if let Some(fetch) = &self.fetch {
-            fetch.clone().prepare(opt).execute(opt)?;
+            let cmd = fetch.clone().prepare(opt);
+            cmd.execute(opt)
+                .map_err(|err| MyError::new(ErrorKind::Fetch, err, cmd))?;
         }
         Ok(())
     }
 
     pub fn compile(&self, opt: &Opt) -> Result<()> {
         if let Some(compile) = &self.compile {
-            compile.clone().prepare(opt).execute(opt)?;
+            let cmd = compile.clone().prepare(opt);
+            cmd.execute(opt)
+                .map_err(|err| MyError::new(ErrorKind::Compile, err, cmd))?;
         }
         Ok(())
     }
 
     pub fn install(&self, opt: &Opt) -> Result<()> {
-        self.install.clone().prepare(opt).execute(opt)?;
+        let cmd = self.install.clone().prepare(opt);
+        cmd.execute(opt)
+            .map_err(|err| MyError::new(ErrorKind::Install, err, cmd))?;
         Ok(())
     }
 }
@@ -182,7 +171,6 @@ impl Cmd {
         Cmd {
             exe: "".into(),
             params: vec![],
-            yes: None,
             current_dir: None,
             env: HashMap::new(),
         }
@@ -190,11 +178,6 @@ impl Cmd {
 
     fn prepare(self, opt: &Opt) -> ActualCmd {
         let mut params = self.params;
-        if opt.yes {
-            if let Some(y) = &self.yes {
-                params.push(y.to_owned());
-            }
-        };
 
         let mut env = self.env;
         if !env.contains_key("PATH") {
@@ -211,45 +194,26 @@ impl Cmd {
 }
 
 impl ActualCmd {
-    fn execute(&self, opt: &Opt) -> Result<bool> {
+    fn execute(&self, opt: &Opt) -> io::Result<ExitStatus> {
         let mut cmd = Command::new(&self.exe);
 
         cmd.args(&self.params).env_clear().envs(&self.env);
 
         if let Some(cdir) = &self.current_dir {
-            cmd.current_dir(std::fs::canonicalize(cdir).unwrap());
+            cmd.current_dir(std::fs::canonicalize(cdir)?);
         }
 
-        let confirm = if opt.yes { "\n" } else { "[Y/n]? " };
-
-        print!("Will execute {}{}", self, confirm);
-        stdout().flush().unwrap();
+        print!("Executing: {}", self);
+        stdout().flush()?;
 
         if opt.quiet {
-            // Maybe we should only hide with the quiet option and not with yes?
             // FIXME: stdin does not work with sudo?
             cmd.stdin(Stdio::null())
                 .stdout(Stdio::null())
                 .stderr(Stdio::null());
         }
 
-        let mut user_continue = String::new();
-        if !opt.yes {
-            std::io::stdin()
-                .read_line(&mut user_continue)
-                .expect("Unable to read user’s input");
-        }
-
-        if user_continue.to_lowercase().starts_with('n') {
-            eprintln!(
-                "user_continue? {} {}",
-                user_continue,
-                user_continue.to_lowercase().starts_with('n')
-            );
-            return Ok(false);
-        }
-
-        Ok(cmd.status().unwrap().success())
+        Ok(cmd.status()?)
     }
 }
 
diff --git a/src/errors.rs b/src/errors.rs
index 804de72..9e89991 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -1,13 +1,17 @@
-use std::error;
-use std::fmt;
+use crate::*;
+
+use std::error::Error;
+use std::fmt::{Display, Formatter, Result};
+use std::io;
 
 /// An error that can occur in this crate.
 ///
 /// Generally, this error corresponds to problems with underlying process.
 #[derive(Debug)]
-pub struct Error {
-    source: Vec<Error>,
+pub struct MyError {
+    source: io::Error,
     kind: ErrorKind,
+    cmd: ActualCmd,
 }
 
 #[derive(Debug)]
@@ -19,9 +23,9 @@ pub enum ErrorKind {
     Install, // TODO: merge into "Update" or "Command" type of error? => Have this as an other level of error?
 }
 
-impl Error {
-    pub(crate) fn new(source: Vec<Error>, kind: ErrorKind) -> Error {
-        Error { source, kind }
+impl MyError {
+    pub(crate) fn new(kind: ErrorKind, source: io::Error, cmd: ActualCmd) -> MyError {
+        MyError { source, kind, cmd }
     }
 
     /// Return the kind of this error.
@@ -30,29 +34,38 @@ impl Error {
     }
 }
 
-impl error::Error for Error {
-    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
-        if self.source.is_empty() {
-            None
-        } else {
-            Some(&self.source[0])
-        }
+impl Error for MyError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        Some(&self.source)
     }
 }
 
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        use std::error::Error;
-
+impl Display for MyError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
         match self.kind {
             ErrorKind::Config => write!(
                 f,
                 "Could not read configuration file: {}",
                 self.source().unwrap()
             ),
-            ErrorKind::Fetch => write!(f, "Could not install: {}", self.source().unwrap()),
-            ErrorKind::Compile => write!(f, "Could not install: {}", self.source().unwrap()),
-            ErrorKind::Install => write!(f, "Could not install: {}", self.source().unwrap()),
+            ErrorKind::Fetch => write!(
+                f,
+                "Could not fetch with command `{}`: {}",
+                self.cmd,
+                self.source().unwrap()
+            ),
+            ErrorKind::Compile => write!(
+                f,
+                "Could not compile with command `{}`: {}",
+                self.cmd,
+                self.source().unwrap()
+            ),
+            ErrorKind::Install => write!(
+                f,
+                "Could not install with command `{}`: {}",
+                self.cmd,
+                self.source().unwrap()
+            ),
         }
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 5c72b97..688ee36 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,10 +5,11 @@ use command::*;
 use errors::*;
 
 use clap::Parser;
+use std::fmt::Display;
 use std::path::PathBuf;
 use std::result;
 
-pub type Result<T> = result::Result<T, Error>;
+pub type Result<T> = result::Result<T, MyError>;
 
 #[derive(Parser)]
 pub struct Opt {
@@ -23,9 +24,6 @@ pub struct Opt {
     //#[arg(default_value_t = PathBuf::from("examples/debian.yml"))]
     pub config_file: PathBuf,
 
-    #[arg(short, long)]
-    pub yes: bool,
-
     #[arg(short, long)]
     pub quiet: bool, // TODO: use clap_verbosity_flag instead
 
@@ -33,8 +31,44 @@ pub struct Opt {
     pub steps: Vec<String>,
 }
 
-pub fn run(opt: &Opt) {
+// enum State {
+//     /// All steps asked were successful
+//     Ok,
+//     Err(MyError),
+// }
+
+// impl Display for State {
+//     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+//         match self {
+//             State::Ok => write!(f, "Ok"),
+//             State::Err(e) => write!(f, "Error: {}", e),
+//             // State::Fetch(e) => write!(f, "Fetch error: {}", e),
+//             // State::Compile(e) => write!(f, "Compile error: {}", e),
+//             // State::Install(e) => write!(f, "Install error: {}", e),
+//         }
+//     }
+// }
+
+pub struct Summary {
+    // TODO: Go back to vectors to keep order?
+    systems: Vec<Result<()>>,
+}
+
+impl Display for Summary {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        writeln!(f, "Summary:")?;
+        for system in &self.systems {
+            // TODO: also print version before/after, update time
+            // writeln!(f, "\t{}\t{}", system.0, system.1)?;
+
+            writeln!(f, "\t{:?}", system)?;
+        }
+        Ok(())
+    }
+}
+
+pub fn run(opt: &Opt) -> Summary {
     let updater = Updater::from_config(opt).unwrap();
 
-    updater.update_all(opt).unwrap();
+    updater.update_all(opt)
 }
diff --git a/src/main.rs b/src/main.rs
index 626c084..3a9601d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,9 +3,8 @@ use system_updater::*;
 
 fn main() {
     let mut opt = Opt::parse();
-    if opt.quiet {
-        opt.yes = true;
-    }
 
-    run(&opt);
+    let summary = run(&opt);
+
+    println!("{}", summary);
 }