Claude-skill-registry Linux Bash

Expert assistance with Linux bash commands, shell scripting, system administration, file operations, and command-line utilities. Use this when working with bash scripts, Linux system operations, or command-line tasks.

install

source · Clone the upstream repo

git clone https://github.com/majiayu000/claude-skill-registry

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/linux-bash" ~/.claude/skills/majiayu000-claude-skill-registry-linux-bash && rm -rf "$T"

manifest: skills/data/linux-bash/SKILL.md

Linux Bash

Expert guidance for Linux bash operations, scripting, and system administration.

Core Commands

File Operations

```
ls -lah
```
- List files with details, including hidden
```
find /path -name "pattern"
```
- Find files by name
```
grep -r "pattern" /path
```
- Recursive text search
```
chmod +x file
```
- Make file executable
```
chown user:group file
```
- Change ownership
```
tar -czf archive.tar.gz dir/
```
- Create compressed archive
```
tar -xzf archive.tar.gz
```
- Extract archive

Process Management

```
ps aux | grep process
```
- Find running processes
```
top
```
/
```
htop
```
- Monitor system resources
```
kill -9 PID
```
- Force kill process
```
nohup command &
```
- Run command in background
```
jobs
```
- List background jobs
```
fg %1
```
- Bring job to foreground

System Information

```
df -h
```
- Disk usage human-readable
```
du -sh dir/
```
- Directory size
```
free -h
```
- Memory usage
```
uname -a
```
- System information
```
lsb_release -a
```
- Distribution info

Text Processing

```
cat file | head -n 10
```
- First 10 lines
```
tail -f log.txt
```
- Follow log file
```
sed 's/old/new/g' file
```
- Replace text
```
awk '{print $1}' file
```
- Print first column
```
sort file | uniq
```
- Remove duplicates

Shell Scripting Best Practices

Script Template

#!/bin/bash
set -euo pipefail  # Exit on error, undefined vars, pipe failures

# Script description
readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

main() {
    # Your logic here
    echo "Hello, World!"
}

main "$@"

Error Handling

# Check command success
if ! command -v tool &> /dev/null; then
    echo "Error: tool not found" >&2
    exit 1
fi

# Trap errors
trap 'echo "Error on line $LINENO"' ERR

Variables

# Constants (uppercase)
readonly CONFIG_FILE="/etc/app.conf"

# Variables (lowercase)
user_input="$1"

# Arrays
files=("file1.txt" "file2.txt")
for file in "${files[@]}"; do
    echo "$file"
done

Common Patterns

Check if file exists

if [[ -f "file.txt" ]]; then
    echo "File exists"
fi

Loop through files

for file in *.txt; do
    echo "Processing $file"
done

Read user input

read -p "Enter value: " user_value

Function definition

my_function() {
    local arg1="$1"
    echo "Received: $arg1"
}

Tips

Quote variables: Always use
```
"$variable"
```
to prevent word splitting
Use [[ ]] for tests: More features than [ ]
Shellcheck: Use
```
shellcheck script.sh
```
to validate scripts
Exit codes: Use
```
$?
```
to check last command status
Debugging: Use
```
set -x
```
to trace execution

Safety First

Always test scripts in safe environment first
Use
```
set -e
```
to exit on errors
Validate input parameters
Quote file paths to handle spaces
Use absolute paths when possible