bash-linux

Topics in the source

• Bash Linux Patterns
• 1. Operator Syntax
• Chaining Commands
• 2. File Operations
• Essential Commands
• 3. Process Management
• 4. Text Processing
• Core Tools

Essential patterns for Bash on Linux/macOS. -- | Operator | Meaning | Example | |----------|---------|---------| | ; | Run sequentially | cmd1; cmd2 | | && | Run if previous succeeded | npm install && npm run dev | | \|\| | Run if previous failed | npm test \|\| echo "Tests failed" | | \| | Pipe output | ls \| grep ".js" | -- | Task | Command | |------|---------| | List all | ls -la | | Find files | find . -name ".js" -type f | | File content | cat file.txt | | First N lines | head -n 20 file.txt | | Last N lines | tail -n 20 file.txt | | Follow log | tail -f log.txt | | Search in files | grep -r "pattern" --include=".js" | | File size | du -sh | | Disk usage | df -h | -- | Task | Command | |------|---------| | List processes | ps aux | | Find by name | ps aux \| grep node | | Kill by PID | kill -9 | | Find port user | lsof -i :3000 | | Kill port | kill -9 $(lsof -t -i :3000) | | Background | npm run dev & | | Jobs | jobs -l | | Bring to front | fg %1 | -- | Tool | Purpose | Example | |------|---------|---------| | grep | Search | grep -rn "TODO" src/ | | sed | Replace | sed -i 's/old/new/g' file.txt | | awk | Extract columns | awk '{print $1}' file.txt | | cut | Cut fields | cut -

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