diff --git a/bin/u_agent/src/lib.rs b/bin/u_agent/src/lib.rs
index 74bb353..876a1b6 100644
--- a/bin/u_agent/src/lib.rs
+++ b/bin/u_agent/src/lib.rs
@@ -77,11 +77,11 @@ pub async fn run_forever() {
     info!("Connecting to the server");
     loop {
         let job_requests: Vec<AssignedJob> =
-            retry_until_ok!(instance.get_agent_jobs(Some(*UID)).await);
+            retry_until_ok!(instance.get_agent_jobs(Some(*UID)).await).into_builtin_vec();
         process_request(job_requests, &instance).await;
         let result: Vec<ExecResult> = pop_completed().await.into_iter().collect();
         if result.len() > 0 {
-            retry_until_ok!(instance.report(&result).await)
+            retry_until_ok!(instance.report(&result).await);
         }
         sleep(Duration::from_secs(5)).await;
     }
diff --git a/bin/u_panel/Cargo.toml b/bin/u_panel/Cargo.toml
index d712325..1f15786 100644
--- a/bin/u_panel/Cargo.toml
+++ b/bin/u_panel/Cargo.toml
@@ -15,3 +15,5 @@ uuid = "0.6.5"
 reqwest = { version = "0.11", features = ["json"] }
 openssl = "*"
 u_lib = { version = "*", path = "../../lib/u_lib" }
+serde_json = "1.0.4"
+serde = { version = "1.0.114", features = ["derive"] }
diff --git a/bin/u_panel/src/main.rs b/bin/u_panel/src/main.rs
index d072d56..99cfed0 100644
--- a/bin/u_panel/src/main.rs
+++ b/bin/u_panel/src/main.rs
@@ -1,14 +1,18 @@
+use serde::Serialize;
 use std::env;
+use std::fmt;
 use structopt::StructOpt;
-use u_lib::{api::ClientHandler, models::JobMeta, utils::init_env, UError};
+use u_lib::{
+    api::ClientHandler, messaging::AsMsg, models::JobMeta, utils::init_env, UError, UResult,
+};
 use uuid::Uuid;
 
-const DELIM: &'static str = "*************\n";
-
 #[derive(StructOpt, Debug)]
 struct Args {
     #[structopt(subcommand)]
     cmd: Cmd,
+    #[structopt(long)]
+    json: bool,
 }
 
 #[derive(StructOpt, Debug)]
@@ -72,60 +76,63 @@ fn parse_uuid(src: &str) -> Result<Uuid, String> {
     Uuid::parse_str(src).map_err(|e| e.to_string())
 }
 
-async fn process_cmd(cmd: Cmd) -> Result<(), UError> {
-    let token = env::var("ADMIN_AUTH_TOKEN").unwrap();
+async fn process_cmd(args: Args) {
+    fn printer<Msg: AsMsg + fmt::Display>(data: UResult<Msg>, json: bool) {
+        if json {
+            #[derive(Serialize)]
+            #[serde(rename_all = "lowercase")]
+            #[serde(tag = "status", content = "data")]
+            enum DataResult<M> {
+                Ok(M),
+                Err(UError),
+            }
+
+            let data = match data {
+                Ok(r) => DataResult::Ok(r),
+                Err(e) => DataResult::Err(e),
+            };
+            println!("{}", serde_json::to_string_pretty(&data).unwrap());
+        } else {
+            match data {
+                Ok(r) => println!("{}", r),
+                Err(e) => eprintln!("Error: {}", e),
+            }
+        }
+    }
+
+    let token = env::var("ADMIN_AUTH_TOKEN").expect("Authentication token is not set");
     let cli_handler = ClientHandler::new(None).password(token);
-    match cmd {
+    let json = args.json;
+    match args.cmd {
         Cmd::Agents(action) => match action {
-            LD::List { uid } => cli_handler
-                .get_agents(uid)
-                .await?
-                .into_iter()
-                .for_each(|r| println!("{}{}", DELIM, r)),
-            LD::Delete { uid } => {
-                println!("{}", cli_handler.del(Some(uid)).await?);
-            }
+            LD::List { uid } => printer(cli_handler.get_agents(uid).await, json),
+            LD::Delete { uid } => printer(cli_handler.del(Some(uid)).await, json),
         },
         Cmd::Jobs(action) => match action {
             JobALD::Add {
                 cmd: JobCmd::Cmd(cmd),
-                agent,
+                agent: _agent,
             } => {
-                let job = JobMeta::from_shell(cmd.join(" "))?;
-                let job_uid = job.id;
-                cli_handler.upload_jobs(&vec![job]).await?;
-                if agent.is_some() {
-                    cli_handler.set_jobs(agent, &vec![job_uid]).await?
-                }
-            }
-            JobALD::LD(LD::List { uid }) => cli_handler
-                .get_jobs(uid)
-                .await?
-                .into_iter()
-                .for_each(|r| println!("{}{}", DELIM, r)),
-            JobALD::LD(LD::Delete { uid }) => {
-                println!("{}", cli_handler.del(Some(uid)).await?)
+                let job = JobMeta::from_shell(cmd.join(" ")).unwrap();
+                printer(cli_handler.upload_jobs(&[job]).await, json);
             }
+            JobALD::LD(LD::List { uid }) => printer(cli_handler.get_jobs(uid).await, json),
+            JobALD::LD(LD::Delete { uid }) => printer(cli_handler.del(Some(uid)).await, json),
         },
         Cmd::Jobmap(action) => match action {
             JmALD::Add {
                 agent_uid,
                 job_uids,
-            } => cli_handler.set_jobs(Some(agent_uid), &job_uids).await?,
-            JmALD::List { uid } => cli_handler
-                .get_agent_jobs(uid)
-                .await?
-                .into_iter()
-                .for_each(|r| println!("{}{}", DELIM, r)),
-            JmALD::Delete { uid } => println!("{}", cli_handler.del(Some(uid)).await?),
+            } => printer(cli_handler.set_jobs(Some(agent_uid), &job_uids).await, json),
+            JmALD::List { uid } => printer(cli_handler.get_agent_jobs(uid).await, json),
+            JmALD::Delete { uid } => printer(cli_handler.del(Some(uid)).await, json),
         },
     }
-    Ok(())
 }
 
 #[tokio::main]
-async fn main() -> Result<(), UError> {
+async fn main() {
     init_env();
     let args: Args = Args::from_args();
-    process_cmd(args.cmd).await
+    process_cmd(args).await;
 }
diff --git a/bin/u_server/src/lib.rs b/bin/u_server/src/lib.rs
index c17717d..1f6b6bb 100644
--- a/bin/u_server/src/lib.rs
+++ b/bin/u_server/src/lib.rs
@@ -109,11 +109,11 @@ fn make_filters() -> impl Filter<Extract = (impl Reply,), Error = Rejection> + C
         .and(get_content::<Vec<ExecResult>>().and_then(Endpoints::report));
 
     let auth_token = format!("Bearer {}", env::var("ADMIN_AUTH_TOKEN").unwrap()).into_boxed_str();
-    let authenticated = warp::header::exact("authorization", Box::leak(auth_token));
+    let auth_header = warp::header::exact("authorization", Box::leak(auth_token));
 
     let agent_zone = get_jobs.clone().or(get_personal_jobs).or(report);
 
-    let auth_zone = authenticated.and(
+    let auth_zone = auth_header.and(
         get_agents
             .or(get_jobs)
             .or(upload_jobs)
diff --git a/integration/Cargo.toml b/integration/Cargo.toml
index fb5000f..dfccd4c 100644
--- a/integration/Cargo.toml
+++ b/integration/Cargo.toml
@@ -15,6 +15,7 @@ reqwest = { version = "0.11", features = ["json"] }
 serde_json = "1.0"
 serde = { version = "1.0.114", features = ["derive"] }
 futures = "0.3.5"
+shlex = "1.0.0"
 
 
 [[test]]
diff --git a/integration/docker-compose.yml b/integration/docker-compose.yml
index 27d7530..997f1bf 100644
--- a/integration/docker-compose.yml
+++ b/integration/docker-compose.yml
@@ -75,6 +75,8 @@ services:
       - ~/.cargo/registry:/root/.cargo/registry
     working_dir:
       /tests/
+    env_file:
+      - ../.env
     depends_on:
       u_agent_1:
         condition: service_started
@@ -83,4 +85,5 @@ services:
       u_server:
         condition: service_healthy
     environment:
-      RUST_BACKTRACE: 1
\ No newline at end of file
+      RUST_BACKTRACE: 1
+      U_SERVER: u_server
\ No newline at end of file
diff --git a/integration/images/u_agent.Dockerfile b/integration/images/u_agent.Dockerfile
index 0a2a76f..3058997 100644
--- a/integration/images/u_agent.Dockerfile
+++ b/integration/images/u_agent.Dockerfile
@@ -1,3 +1,3 @@
 FROM centos:7
 
-CMD yum update
\ No newline at end of file
+RUN yum update -y
\ No newline at end of file
diff --git a/integration/tests/behaviour.rs b/integration/tests/behaviour.rs
index 617f329..8b13789 100644
--- a/integration/tests/behaviour.rs
+++ b/integration/tests/behaviour.rs
@@ -1,38 +1 @@
-use crate::helpers::client::AgentClient;
-use serde_json::json;
-use uuid::Uuid;
 
-type TestResult<R = ()> = Result<R, Box<dyn std::error::Error>>;
-
-async fn register_agent() -> Uuid {
-    let cli = AgentClient::new();
-    let agent_uid = Uuid::new_v4();
-    let resp = cli.get(format!("get_agent_jobs/{}", agent_uid)).await;
-    let job_id = &resp["job_id"];
-    let resp = cli.get(format!("get_jobs/{}", job_id)).await;
-    assert_eq!(&resp["alias"], "agent_hello");
-    let agent_data = json! {
-        {"id": &agent_uid,"inner":[
-            {"Agent":
-                {"alias":null,
-                "hostname":"3b1030fa6324",
-                "id":&agent_uid,
-                "is_root":false,
-                "is_root_allowed":false,
-                "last_active":{"secs_since_epoch":1625271265,"nanos_since_epoch":92814921},
-                "platform":"x86_64-unknown-linux-gnu",
-                "regtime":{"secs_since_epoch":1625271265,"nanos_since_epoch":92814945},
-                "state":"New",
-                "token":null,
-                "username":"root"}
-        }]}
-    };
-    cli.post("report", &agent_data).await;
-    agent_uid
-}
-
-#[tokio::test]
-async fn test_first_connection() -> TestResult {
-    register_agent().await;
-    Ok(())
-}
diff --git a/integration/tests/helpers/mod.rs b/integration/tests/helpers/mod.rs
index b9babe5..0957ad9 100644
--- a/integration/tests/helpers/mod.rs
+++ b/integration/tests/helpers/mod.rs
@@ -1 +1,5 @@
 pub mod client;
+pub mod panel;
+
+pub use client::AgentClient;
+pub use panel::Panel;
diff --git a/integration/tests/helpers/panel.rs b/integration/tests/helpers/panel.rs
index fe7eeab..1d616c7 100644
--- a/integration/tests/helpers/panel.rs
+++ b/integration/tests/helpers/panel.rs
@@ -1,3 +1,40 @@
-const BINARY: &str = "/u_panel";
+use serde_json::{from_slice, Value};
+use shlex::split;
+use std::process::{Command, Output};
+
+const PANEL_BINARY: &str = "/u_panel";
 
 pub struct Panel;
+
+impl Panel {
+    fn run(args: &[&str]) -> Output {
+        Command::new(PANEL_BINARY)
+            .arg("--json")
+            .args(args)
+            .output()
+            .unwrap()
+    }
+
+    pub fn output_argv(args: &[&str]) -> Value {
+        let result = Self::run(args);
+        assert!(result.status.success());
+        from_slice(&result.stdout).unwrap()
+    }
+
+    pub fn output(args: &str) -> Value {
+        let splitted = split(args).unwrap();
+        Self::output_argv(
+            splitted
+                .iter()
+                .map(|s| s.as_ref())
+                .collect::<Vec<&str>>()
+                .as_ref(),
+        )
+    }
+
+    pub fn check_output(args: &str) -> Vec<Value> {
+        let result = Self::output(args);
+        assert_eq!(result["status"], "ok");
+        result["data"].as_array().unwrap().clone()
+    }
+}
diff --git a/integration/tests/tests.rs b/integration/tests/tests.rs
index bb44d7e..5b92396 100644
--- a/integration/tests/tests.rs
+++ b/integration/tests/tests.rs
@@ -1,2 +1,54 @@
-mod behaviour;
 mod helpers;
+
+use helpers::{AgentClient, Panel};
+
+use serde_json::json;
+use uuid::Uuid;
+
+type TestResult<R = ()> = Result<R, Box<dyn std::error::Error>>;
+
+async fn register_agent() -> Uuid {
+    let cli = AgentClient::new();
+    let agent_uid = Uuid::new_v4();
+    let resp = cli.get(format!("get_agent_jobs/{}", agent_uid)).await;
+    let job_id = &resp["job_id"];
+    let resp = cli.get(format!("get_jobs/{}", job_id)).await;
+    assert_eq!(&resp["alias"], "agent_hello");
+    let agent_data = json! {
+        {"id": &agent_uid,"inner":[
+            {"Agent":
+                {"alias":null,
+                "hostname":"3b1030fa6324",
+                "id":&agent_uid,
+                "is_root":false,
+                "is_root_allowed":false,
+                "last_active":{"secs_since_epoch":1625271265,"nanos_since_epoch":92814921},
+                "platform":"x86_64-unknown-linux-gnu",
+                "regtime":{"secs_since_epoch":1625271265,"nanos_since_epoch":92814945},
+                "state":"New",
+                "token":null,
+                "username":"root"}
+        }]}
+    };
+    cli.post("report", &agent_data).await;
+    agent_uid
+}
+
+#[tokio::test]
+async fn test_first_connection() -> TestResult {
+    let uid = register_agent().await;
+    let agents = Panel::check_output("agents list");
+    dbg!(&agents);
+    assert_eq!(agents.len(), 2);
+    let found = agents
+        .iter()
+        .find(|v| v["id"].as_str().unwrap() == uid.to_string());
+    assert!(found.is_some());
+    Ok(())
+}
+
+#[tokio::test]
+async fn test_setup_tasks() -> TestResult {
+    register_agent().await;
+    Ok(())
+}
diff --git a/lib/u_lib/src/api.rs b/lib/u_lib/src/api.rs
index 136861d..1481ff6 100644
--- a/lib/u_lib/src/api.rs
+++ b/lib/u_lib/src/api.rs
@@ -3,10 +3,11 @@ use crate::{
     config::{MASTER_PORT, MASTER_SERVER},
     messaging::{AsMsg, BaseMessage},
     models::*,
-    utils::opt_to_string,
+    utils::{opt_to_string, VecDisplay},
     UError, UResult,
 };
 use reqwest::{Client, RequestBuilder, Url};
+use std::env;
 use u_api_proc_macro::api_route;
 use uuid::Uuid;
 
@@ -18,9 +19,8 @@ pub struct ClientHandler {
 
 impl ClientHandler {
     pub fn new(server: Option<&str>) -> Self {
-        let master_server = server
-            //.map(|s| Ipv4Addr::from_str(&s).unwrap())
-            .unwrap_or(MASTER_SERVER);
+        let env_server = env::var("U_SERVER").unwrap_or(String::from(MASTER_SERVER));
+        let master_server = server.unwrap_or(env_server.as_str());
         Self {
             client: Client::new(),
             base_url: Url::parse(&format!("http://{}:{}", master_server, MASTER_PORT)).unwrap(),
@@ -52,24 +52,24 @@ impl ClientHandler {
     //
     // get jobs for client
     #[api_route("GET")]
-    fn get_agent_jobs(&self, url_param: Option<Uuid>) -> Vec<AssignedJob> {}
+    fn get_agent_jobs(&self, url_param: Option<Uuid>) -> VecDisplay<AssignedJob> {}
     //
     // send something to server
     #[api_route("POST")]
-    fn report<M: AsMsg>(&self, payload: &M) {}
+    fn report<M: AsMsg>(&self, payload: &M) -> Empty {}
 
     //##########// Admin area //##########//
     /// client listing
     #[api_route("GET")]
-    fn get_agents(&self, url_param: Option<Uuid>) -> Vec<Agent> {}
+    fn get_agents(&self, url_param: Option<Uuid>) -> VecDisplay<Agent> {}
     //
     // get all available jobs
     #[api_route("GET")]
-    fn get_jobs(&self, url_param: Option<Uuid>) -> Vec<JobMeta> {}
+    fn get_jobs(&self, url_param: Option<Uuid>) -> VecDisplay<JobMeta> {}
     //
     // create and upload job
     #[api_route("POST")]
-    fn upload_jobs(&self, payload: &Vec<JobMeta>) {}
+    fn upload_jobs(&self, payload: &[JobMeta]) -> Empty {}
     //
     // delete something
     #[api_route("GET")]
@@ -77,5 +77,5 @@ impl ClientHandler {
     //
     // set jobs for client
     #[api_route("POST")]
-    fn set_jobs(&self, url_param: Option<Uuid>, payload: &Vec<Uuid>) {}
+    fn set_jobs(&self, url_param: Option<Uuid>, payload: &[Uuid]) -> Empty {}
 }
diff --git a/lib/u_lib/src/builder.rs b/lib/u_lib/src/builder.rs
index 2c60c8a..14b172d 100644
--- a/lib/u_lib/src/builder.rs
+++ b/lib/u_lib/src/builder.rs
@@ -2,7 +2,7 @@ use crate::{
     cache::JobCache,
     executor::{FutRes, Waiter, DynFut},
     models::{Agent, AssignedJob, JobMeta, JobType},
-    utils::{CombinedResult, OneOrMany},
+    utils::{CombinedResult, OneOrVec},
     UError,
 };
 use guess_host_triple::guess_host_triple;
@@ -13,7 +13,7 @@ pub struct JobBuilder {
 }
 
 impl JobBuilder {
-    pub fn from_request<J: OneOrMany<AssignedJob>>(job_requests: J) -> CombinedResult<Self> {
+    pub fn from_request<J: OneOrVec<AssignedJob>>(job_requests: J) -> CombinedResult<Self> {
         let job_requests = job_requests.into_vec();
         let mut prepared: Vec<DynFut> = vec![];
         let mut result = CombinedResult::new();
@@ -52,7 +52,7 @@ impl JobBuilder {
         result
     }
 
-    pub fn from_meta<J: OneOrMany<JobMeta>>(job_metas: J) -> CombinedResult<Self> {
+    pub fn from_meta<J: OneOrVec<JobMeta>>(job_metas: J) -> CombinedResult<Self> {
         let job_requests = job_metas
             .into_vec()
             .into_iter()
@@ -90,7 +90,7 @@ pub struct NamedJobBuilder {
 }
 
 impl NamedJobBuilder {
-    pub fn from_shell<J: OneOrMany<(&'static str, &'static str)>>(
+    pub fn from_shell<J: OneOrVec<(&'static str, &'static str)>>(
         named_jobs: J,
     ) -> CombinedResult<Self> {
         let mut result = CombinedResult::new();
@@ -111,7 +111,7 @@ impl NamedJobBuilder {
         result
     }
 
-    pub fn from_meta<J: OneOrMany<(&'static str, JobMeta)>>(named_jobs: J) -> Self {
+    pub fn from_meta<J: OneOrVec<(&'static str, JobMeta)>>(named_jobs: J) -> Self {
         let mut job_names = vec![];
         let job_metas: Vec<JobMeta> = named_jobs
             .into_vec()
diff --git a/lib/u_lib/src/executor.rs b/lib/u_lib/src/executor.rs
index c4d6492..95ab8aa 100644
--- a/lib/u_lib/src/executor.rs
+++ b/lib/u_lib/src/executor.rs
@@ -1,7 +1,7 @@
-use crate::{utils::OneOrMany, models::ExecResult};
+use crate::{models::ExecResult, utils::OneOrVec};
 use futures::{future::BoxFuture, lock::Mutex};
 use lazy_static::lazy_static;
-use std::{collections::HashMap};
+use std::collections::HashMap;
 use tokio::{
     spawn,
     sync::mpsc::{channel, Receiver, Sender},
@@ -37,7 +37,7 @@ pub struct Waiter {
 }
 
 impl Waiter {
-    pub fn new<S: OneOrMany<DynFut>>(tasks: S) -> Self {
+    pub fn new<S: OneOrVec<DynFut>>(tasks: S) -> Self {
         Self {
             tasks: tasks.into_vec(),
             fids: vec![],
diff --git a/lib/u_lib/src/messaging.rs b/lib/u_lib/src/messaging.rs
index b227c34..3af1933 100644
--- a/lib/u_lib/src/messaging.rs
+++ b/lib/u_lib/src/messaging.rs
@@ -1,6 +1,8 @@
+use crate::utils::VecDisplay;
 use crate::UID;
 use serde::{Deserialize, Serialize};
 use std::borrow::Cow;
+use std::fmt::Display;
 use uuid::Uuid;
 
 pub struct Moo<'cow, T: AsMsg + Clone>(pub Cow<'cow, T>);
@@ -29,6 +31,8 @@ impl<'cow, M: AsMsg> From<&'cow M> for Moo<'cow, M> {
 }
 
 impl<M: AsMsg> AsMsg for Vec<M> {}
+impl<M: AsMsg + Display> AsMsg for VecDisplay<M> {}
+impl<'msg, M: AsMsg> AsMsg for &'msg [M] {}
 
 #[derive(Serialize, Deserialize, Debug)]
 pub struct BaseMessage<'cow, I: AsMsg> {
diff --git a/lib/u_lib/src/models/jobs/misc.rs b/lib/u_lib/src/models/jobs/misc.rs
index 1fc3648..7451548 100644
--- a/lib/u_lib/src/models/jobs/misc.rs
+++ b/lib/u_lib/src/models/jobs/misc.rs
@@ -139,7 +139,7 @@ impl JobOutput {
 
 #[cfg(test)]
 mod tests {
-    use crate::{models::JobOutput, utils::vec_to_string};
+    use crate::{models::JobOutput, utils::bytes_to_string};
     use test_case::test_case;
 
     const STDOUT: &str = "<***STDOUT***>";
@@ -161,7 +161,7 @@ mod tests {
         let output = JobOutput::new()
             .stdout(stdout.as_bytes().to_vec())
             .stderr(stderr.as_bytes().to_vec());
-        assert_eq!(&vec_to_string(&output.into_combined()), result)
+        assert_eq!(&bytes_to_string(&output.into_combined()), result)
     }
 
     #[test_case(
@@ -181,6 +181,6 @@ mod tests {
     )]
     fn test_from_combined(src: &str, result: &str) {
         let output = JobOutput::from_combined(src.as_bytes()).unwrap();
-        assert_eq!(vec_to_string(&output.to_appropriate()).trim(), result);
+        assert_eq!(bytes_to_string(&output.to_appropriate()).trim(), result);
     }
 }
diff --git a/lib/u_lib/src/models/mod.rs b/lib/u_lib/src/models/mod.rs
index 9406e9a..d30a33a 100644
--- a/lib/u_lib/src/models/mod.rs
+++ b/lib/u_lib/src/models/mod.rs
@@ -6,6 +6,8 @@ pub mod schema;
 use crate::messaging::AsMsg;
 pub use crate::models::result::ExecResult;
 pub use crate::models::{agent::*, jobs::*};
+use serde::{Deserialize, Serialize};
+use std::fmt;
 use uuid::Uuid;
 
 impl AsMsg for Agent {}
@@ -14,4 +16,13 @@ impl AsMsg for ExecResult {}
 impl AsMsg for JobMeta {}
 impl AsMsg for String {}
 impl AsMsg for Uuid {}
-impl AsMsg for () {}
+impl AsMsg for Empty {}
+
+#[derive(Serialize, Deserialize, Clone, Default, Debug)]
+pub struct Empty;
+
+impl fmt::Display for Empty {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "<empty>")
+    }
+}
diff --git a/lib/u_lib/src/utils.rs b/lib/u_lib/src/utils.rs
deleted file mode 100644
index b43c968..0000000
--- a/lib/u_lib/src/utils.rs
+++ /dev/null
@@ -1,168 +0,0 @@
-use crate::UError;
-use chrono::{offset::Local, DateTime};
-use nix::{
-    sys::signal::{signal, SigHandler, Signal},
-    unistd::{chdir, close as fdclose, fork, getppid, setsid, ForkResult},
-};
-use std::{
-    env::temp_dir, fs, ops::Drop, os::unix::fs::PermissionsExt, path::PathBuf, process::exit,
-    time::SystemTime,
-};
-use uuid::Uuid;
-
-pub trait OneOrMany<T> {
-    fn into_vec(self) -> Vec<T>;
-}
-
-impl<T> OneOrMany<T> for T {
-    fn into_vec(self) -> Vec<T> {
-        vec![self]
-    }
-}
-
-impl<T> OneOrMany<T> for Vec<T> {
-    fn into_vec(self) -> Vec<T> {
-        self
-    }
-}
-
-pub struct TempFile {
-    path: PathBuf,
-}
-
-impl TempFile {
-    pub fn get_path(&self) -> String {
-        self.path.to_string_lossy().to_string()
-    }
-
-    pub fn new() -> Self {
-        let name = Uuid::simple(&Uuid::new_v4()).to_string();
-        let mut path = temp_dir();
-        path.push(name);
-        Self { path }
-    }
-
-    pub fn write_all(&self, data: &[u8]) -> Result<(), String> {
-        fs::write(&self.path, data).map_err(|e| e.to_string())
-    }
-
-    pub fn write_exec(data: &[u8]) -> Result<Self, (String, String)> {
-        let this = Self::new();
-        let path = this.get_path();
-        this.write_all(data).map_err(|e| (path.clone(), e))?;
-        let perms = fs::Permissions::from_mode(0o555);
-        fs::set_permissions(&path, perms).map_err(|e| (path, e.to_string()))?;
-        Ok(this)
-    }
-}
-
-impl Drop for TempFile {
-    fn drop(&mut self) {
-        fs::remove_file(&self.path).ok();
-    }
-}
-
-pub struct CombinedResult<T, E = UError> {
-    ok: Vec<T>,
-    err: Vec<E>,
-}
-
-impl<T, E> CombinedResult<T, E> {
-    pub fn new() -> Self {
-        Self {
-            ok: vec![],
-            err: vec![],
-        }
-    }
-
-    pub fn ok<I: OneOrMany<T>>(&mut self, result: I) {
-        self.ok.extend(result.into_vec());
-    }
-
-    pub fn err<I: OneOrMany<E>>(&mut self, err: I) {
-        self.err.extend(err.into_vec());
-    }
-
-    pub fn unwrap(self) -> Vec<T> {
-        let err_len = self.err.len();
-        if err_len > 0 {
-            panic!("CombinedResult has {} errors", err_len);
-        }
-        self.ok
-    }
-
-    pub fn unwrap_one(self) -> T {
-        self.unwrap().pop().unwrap()
-    }
-
-    pub fn pop_errors(&mut self) -> Vec<E> {
-        self.err.drain(..).collect()
-    }
-}
-
-#[macro_export]
-macro_rules! unwrap_enum {
-    ($src:ident, $t:path) => {
-        if let $t(result) = $src {
-            result
-        } else {
-            panic!("wrong type")
-        }
-    };
-}
-
-pub fn daemonize() {
-    if getppid().as_raw() != 1 {
-        setsig(Signal::SIGTTOU, SigHandler::SigIgn);
-        setsig(Signal::SIGTTIN, SigHandler::SigIgn);
-        setsig(Signal::SIGTSTP, SigHandler::SigIgn);
-    }
-    for fd in 0..=2 {
-        match fdclose(fd) {
-            _ => (),
-        }
-    }
-    match chdir("/") {
-        _ => (),
-    };
-
-    match fork() {
-        Ok(ForkResult::Parent { .. }) => {
-            exit(0);
-        }
-        Ok(ForkResult::Child) => match setsid() {
-            _ => (),
-        },
-        Err(_) => exit(255),
-    }
-}
-
-pub fn setsig(sig: Signal, hnd: SigHandler) {
-    unsafe {
-        signal(sig, hnd).unwrap();
-    }
-}
-
-pub fn vec_to_string(v: &[u8]) -> String {
-    String::from_utf8_lossy(v).to_string()
-}
-
-pub fn opt_to_string<T: ToString>(item: Option<T>) -> String {
-    match item {
-        Some(s) => s.to_string(),
-        None => String::new(),
-    }
-}
-
-pub fn systime_to_string(time: &SystemTime) -> String {
-    DateTime::<Local>::from(*time)
-        .format("%d/%m/%Y %T")
-        .to_string()
-}
-
-pub fn init_env() {
-    let envs = [".env"];
-    for envfile in &envs {
-        dotenv::from_filename(envfile).ok();
-    }
-}
diff --git a/lib/u_lib/src/utils/combined_result.rs b/lib/u_lib/src/utils/combined_result.rs
new file mode 100644
index 0000000..687f541
--- /dev/null
+++ b/lib/u_lib/src/utils/combined_result.rs
@@ -0,0 +1,40 @@
+use crate::utils::OneOrVec;
+use crate::UError;
+
+pub struct CombinedResult<T, E = UError> {
+    ok: Vec<T>,
+    err: Vec<E>,
+}
+
+impl<T, E> CombinedResult<T, E> {
+    pub fn new() -> Self {
+        Self {
+            ok: vec![],
+            err: vec![],
+        }
+    }
+
+    pub fn ok<I: OneOrVec<T>>(&mut self, result: I) {
+        self.ok.extend(result.into_vec());
+    }
+
+    pub fn err<I: OneOrVec<E>>(&mut self, err: I) {
+        self.err.extend(err.into_vec());
+    }
+
+    pub fn unwrap(self) -> Vec<T> {
+        let err_len = self.err.len();
+        if err_len > 0 {
+            panic!("CombinedResult has {} errors", err_len);
+        }
+        self.ok
+    }
+
+    pub fn unwrap_one(self) -> T {
+        self.unwrap().pop().unwrap()
+    }
+
+    pub fn pop_errors(&mut self) -> Vec<E> {
+        self.err.drain(..).collect()
+    }
+}
diff --git a/lib/u_lib/src/utils/conv.rs b/lib/u_lib/src/utils/conv.rs
new file mode 100644
index 0000000..9cb2166
--- /dev/null
+++ b/lib/u_lib/src/utils/conv.rs
@@ -0,0 +1,19 @@
+use chrono::{offset::Local, DateTime};
+use std::time::SystemTime;
+
+pub fn bytes_to_string(v: &[u8]) -> String {
+    String::from_utf8_lossy(v).to_string()
+}
+
+pub fn opt_to_string<T: ToString>(item: Option<T>) -> String {
+    match item {
+        Some(s) => s.to_string(),
+        None => String::new(),
+    }
+}
+
+pub fn systime_to_string(time: &SystemTime) -> String {
+    DateTime::<Local>::from(*time)
+        .format("%d/%m/%Y %T")
+        .to_string()
+}
diff --git a/lib/u_lib/src/utils/misc.rs b/lib/u_lib/src/utils/misc.rs
new file mode 100644
index 0000000..4f93a85
--- /dev/null
+++ b/lib/u_lib/src/utils/misc.rs
@@ -0,0 +1,71 @@
+use nix::{
+    sys::signal::{signal, SigHandler, Signal},
+    unistd::{chdir, close as fdclose, fork, getppid, setsid, ForkResult},
+};
+use std::process::exit;
+
+pub trait OneOrVec<T> {
+    fn into_vec(self) -> Vec<T>;
+}
+
+impl<T> OneOrVec<T> for T {
+    fn into_vec(self) -> Vec<T> {
+        vec![self]
+    }
+}
+
+impl<T> OneOrVec<T> for Vec<T> {
+    fn into_vec(self) -> Vec<T> {
+        self
+    }
+}
+
+#[macro_export]
+macro_rules! unwrap_enum {
+    ($src:ident, $t:path) => {
+        if let $t(result) = $src {
+            result
+        } else {
+            panic!("wrong type")
+        }
+    };
+}
+
+pub fn daemonize() {
+    if getppid().as_raw() != 1 {
+        setsig(Signal::SIGTTOU, SigHandler::SigIgn);
+        setsig(Signal::SIGTTIN, SigHandler::SigIgn);
+        setsig(Signal::SIGTSTP, SigHandler::SigIgn);
+    }
+    for fd in 0..=2 {
+        match fdclose(fd) {
+            _ => (),
+        }
+    }
+    match chdir("/") {
+        _ => (),
+    };
+
+    match fork() {
+        Ok(ForkResult::Parent { .. }) => {
+            exit(0);
+        }
+        Ok(ForkResult::Child) => match setsid() {
+            _ => (),
+        },
+        Err(_) => exit(255),
+    }
+}
+
+pub fn setsig(sig: Signal, hnd: SigHandler) {
+    unsafe {
+        signal(sig, hnd).unwrap();
+    }
+}
+
+pub fn init_env() {
+    let envs = [".env"];
+    for envfile in &envs {
+        dotenv::from_filename(envfile).ok();
+    }
+}
diff --git a/lib/u_lib/src/utils/mod.rs b/lib/u_lib/src/utils/mod.rs
new file mode 100644
index 0000000..13f94d3
--- /dev/null
+++ b/lib/u_lib/src/utils/mod.rs
@@ -0,0 +1,11 @@
+pub mod combined_result;
+pub mod conv;
+pub mod misc;
+pub mod tempfile;
+pub mod vec_display;
+
+pub use combined_result::*;
+pub use conv::*;
+pub use misc::*;
+pub use tempfile::*;
+pub use vec_display::*;
diff --git a/lib/u_lib/src/utils/tempfile.rs b/lib/u_lib/src/utils/tempfile.rs
new file mode 100644
index 0000000..e76baa8
--- /dev/null
+++ b/lib/u_lib/src/utils/tempfile.rs
@@ -0,0 +1,38 @@
+use std::{env::temp_dir, fs, ops::Drop, os::unix::fs::PermissionsExt, path::PathBuf};
+use uuid::Uuid;
+
+pub struct TempFile {
+    path: PathBuf,
+}
+
+impl TempFile {
+    pub fn get_path(&self) -> String {
+        self.path.to_string_lossy().to_string()
+    }
+
+    pub fn new() -> Self {
+        let name = Uuid::simple(&Uuid::new_v4()).to_string();
+        let mut path = temp_dir();
+        path.push(name);
+        Self { path }
+    }
+
+    pub fn write_all(&self, data: &[u8]) -> Result<(), String> {
+        fs::write(&self.path, data).map_err(|e| e.to_string())
+    }
+
+    pub fn write_exec(data: &[u8]) -> Result<Self, (String, String)> {
+        let this = Self::new();
+        let path = this.get_path();
+        this.write_all(data).map_err(|e| (path.clone(), e))?;
+        let perms = fs::Permissions::from_mode(0o555);
+        fs::set_permissions(&path, perms).map_err(|e| (path, e.to_string()))?;
+        Ok(this)
+    }
+}
+
+impl Drop for TempFile {
+    fn drop(&mut self) {
+        fs::remove_file(&self.path).ok();
+    }
+}
diff --git a/lib/u_lib/src/utils/vec_display.rs b/lib/u_lib/src/utils/vec_display.rs
new file mode 100644
index 0000000..117ee44
--- /dev/null
+++ b/lib/u_lib/src/utils/vec_display.rs
@@ -0,0 +1,40 @@
+use crate::{messaging::AsMsg, utils::OneOrVec};
+use serde::{Deserialize, Serialize};
+use std::fmt::{self, Display, Formatter};
+use std::ops::{Deref, DerefMut};
+
+#[derive(Serialize, Deserialize, Clone, Default)]
+pub struct VecDisplay<T: AsMsg + Display>(pub Vec<T>);
+
+impl<T: AsMsg + Display> VecDisplay<T> {
+    pub fn new<I: OneOrVec<T>>(inner: I) -> Self {
+        VecDisplay(inner.into_vec())
+    }
+
+    pub fn into_builtin_vec(self) -> Vec<T> {
+        self.0
+    }
+}
+
+impl<T: AsMsg + Display> Deref for VecDisplay<T> {
+    type Target = Vec<T>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<T: AsMsg + Display> DerefMut for VecDisplay<T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+impl<T: AsMsg + Display> Display for VecDisplay<T> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        for (i, itm) in self.0.iter().enumerate() {
+            writeln!(f, "### {}:\n{}\n", i, itm)?;
+        }
+        Ok(())
+    }
+}
diff --git a/scripts/cargo_musl.sh b/scripts/cargo_musl.sh
index 5e1395f..c33121b 100755
--- a/scripts/cargo_musl.sh
+++ b/scripts/cargo_musl.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 set -e
 source $(dirname $0)/rootdir.sh #set ROOTDIR
+umask 002
 docker run \
     -v $ROOTDIR:/volume \
     -v cargo-cache:/root/.cargo/registry \
@@ -8,4 +9,3 @@ docker run \
     -it \
     unki/musllibs \
     cargo $@
-