diff --git a/README.md b/README.md
index 1ba5eff..f22b950 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # judger-rs
 
-![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/OJ-lab/judger/rust-check.yml)
-![Discord](https://img.shields.io/discord/916955582181822486)
+![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/OJ-lab/judger/rust-check.yml?logo=github&label=Core%20Tests)
+![Discord](https://img.shields.io/discord/916955582181822486?label=Discord&color=blue&logo=discord&logoColor=white)
 
 Judger is supposed to be a simple **sandbox service** which works for online-judge systems.
 
@@ -20,19 +20,8 @@ We'll consider other platform, but in a lower priority.
 If you are not familiar with system stuff.
 Developing judger-rs in local computer can be dangerous.
 
-Github codespace is the currently the most perfered approach.
-When first setup the cloud machine, run `ENV_SETUP.bash` to get essentials,
-also install the recommended plugins provided in VSCode.
-
-## Run by admin
-
-`judge-core` build a sandbox environment by `seccomp`, so it's neccessary to run tests or examples by admin.
-You need to install **Rust** in root user.
-
-``` sh
-su
-curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
-```
+Github codespace is the currently the most perfered approach,
+it will setup all the needed environment for you.
 
 ## Contribute
 
@@ -41,4 +30,3 @@ We have a guide in judger's [WIKI](https://github.com/OJ-lab/judger/wiki/Contrib
 ## Deeper Docs
 
 - [judge-core README](judge-core/README.md)
-- [judge-cli README](judge-cli/README.md)
diff --git a/judge-core/Cargo.toml b/judge-core/Cargo.toml
index dd4c1d2..10df489 100644
--- a/judge-core/Cargo.toml
+++ b/judge-core/Cargo.toml
@@ -19,4 +19,6 @@ serde_json = "1"
 serde_yaml = "0.9"
 
 [dev-dependencies]
+# Need to lock the version of env_logger to 0.10.0
+# 0.11.0 will break the test currently
 env_logger = "0.11.0"
diff --git a/judge-core/README.md b/judge-core/README.md
index 6edfb7a..8e6ed8d 100644
--- a/judge-core/README.md
+++ b/judge-core/README.md
@@ -19,7 +19,7 @@ supposing the judge directory structure is following [ICPC Problem Package forma
 Currently we are using a very normal approach by just running the following command:
 
 ``` shell
-strace ./tmp/icpc/program
+strace $program_path
 ```
 
 It will be better if we have a strace runned executor.
diff --git a/judge-core/src/run/executor.rs b/judge-core/src/run/executor.rs
index fc266ef..d9cc1a6 100644
--- a/judge-core/src/run/executor.rs
+++ b/judge-core/src/run/executor.rs
@@ -11,6 +11,8 @@ pub struct Executor {
     pub additional_args: Vec<String>,
 }
 
+// Do not do logging or some other additional things which may use system calls
+// these will blocked by seccomp filter unexpectedly
 impl Executor {
     pub fn new(language: Language, path: PathBuf) -> Result<Self, JudgeCoreError> {
         if !path.exists() {
@@ -36,7 +38,6 @@ impl Executor {
             .iter()
             .map(|s| CString::new(s.as_bytes()))
             .collect::<Result<Vec<_>, _>>()?;
-        log::debug!("execve: {:?} {:?}", command, c_args);
         Ok(execve(
             &CString::new(command)?,
             c_args.as_slice(),
diff --git a/judger/README.md b/judger/README.md
index 3bc02a7..f88f6ed 100644
--- a/judger/README.md
+++ b/judger/README.md
@@ -16,17 +16,6 @@ cargo run --bin judger-cli -- [COMMAND]
 cargo run --bin judger-cli -- batch-judge --help
 ```
 
-For an example usage of the lastest batch judge feature:
-
-``` shell
-cargo run --bin judger-cli -- batch-judge \
-    -s test-collection/src/programs/read_and_write.cpp \
-    -p test-collection/packages/icpc/hello_world \
-    -l cpp \
-    -t icpc \
-    -r tmp/icpc
-```
-
 ## Server
 
 ### How to run
diff --git a/scripts/env_setup.bash b/scripts/env_setup.bash
index 6a15a86..04cff14 100755
--- a/scripts/env_setup.bash
+++ b/scripts/env_setup.bash
@@ -20,7 +20,7 @@ if ! [ -x "$(command -v rustup)" ]; then
     echo 'rustup not found. Installing rustup...'
     curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > scripts/thirdparty/rustup.sh
     chmod +x scripts/thirdparty/rustup.sh
-    sudo scripts/thirdparty/rustup.sh -y
+    scripts/thirdparty/rustup.sh -y
 fi
 
 echo 'Ensuring rclone is installed...'