shell
Shell scripting, bash, zsh, process management, and terminal productivity
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- NeuralBlitz/Mito
- Dernière activité de la source
- 22 mars 2026 à 13:29
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SKILL.md
Instructions source · Aperçu en lecture seule- name
- shell
- description
- Shell scripting, bash, zsh, process management, and terminal productivity
- license
- MIT
- compatibility
- opencode
- metadata
- {"audience":"developers","category":"scripting"}
## What I do
- Use shell commands effectively
- Write robust shell scripts
- Manage processes and jobs
- Handle I/O redirection and pipes
- Automate tasks
- Debug shell scripts
## When to use me
When working in terminal, automating tasks, or writing shell scripts.
## Shell Types
- **bash**: Bourne Again Shell, most popular
- **zsh**: Z Shell, Oh My Zsh, advanced features
- **fish**: Friendly Interactive Shell, user-friendly
- **sh**: POSIX shell, portable
## Basic Commands
### File Operations
```bash
ls -la # List with details
cp -r # Copy recursive
rm -rf # Force remove
mkdir -p # Create nested dirs
chmod # Change permissions
chown # Change owner
```
### Text Processing
```bash
cat # View file
grep # Search pattern
sed # Stream editor
awk # Text processing
sort # Sort lines
uniq # Unique lines
head/tail # First/last lines
wc # Word count
```
### System
```bash
ps # Process status
top/htop # Process monitor
kill # Kill process
df # Disk free
du # Disk usage
free # Memory
```
## Scripting
### Shebang
```bash
#!/bin/bash
#!/usr/bin/env bash
```
### Variables
```bash
NAME="John"
echo $NAME
echo ${NAME}
# Arrays
arr=(one two three)
echo ${arr[0]}
```
### Conditionals
```bash
if [ $name = "admin" ]; then
echo "Hello admin"
elif [ $name = "guest" ]; then
echo "Hello guest"
else
echo "Hello stranger"
fi
```
### Loops
```bash
# For loop
for f in *.txt; do
echo "Processing $f"
done
# While loop
while read line; do
echo "$line"
done < file.txt
```
### Functions
```bash
greet() {
local name=$1
echo "Hello, $name"
}
greet "World"
```
## Advanced Features
### I/O Redirection
```bash
> # Redirect stdout
2> # Redirect stderr
&> # Redirect both
>> # Append
< # Redirect stdin
| # Pipe
```
### Process Substitution
```bash
diff <(ls dir1) <(ls dir2)
```
### Parameter Expansion
```bash
${var:-default} # Default if unset
${var:=default} # Set default
${var:?error} # Error if unset
${var#pattern} # Remove prefix
${var%pattern} # Remove suffix
${var/old/new} # Replace
```
### Globbing
```bash
*.txt # All txt files
file?.txt # file1.txt, file2.txt
[abc]*.txt # Starting with a,b,c
```
## Best Practices
- Use `set -euo pipefail`
- Quote variables
- Use `[[ ]]` over `[ ]`
- Add comments
- Use functions
- Check exit codes
- Use shellcheck
- Make scripts portable
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