Linux Commands Reference - Complete Linux Command Guide
Comprehensive Linux command reference with 150+ commands. Search, filter by category, and view detailed usage examples.
watch
Execute command periodically, full-screen display
Syntax
watch [OPTION] COMMANDCommon Options
-nSet interval seconds (default 2)-dHighlight changes-tNo header-bBeep on command failure-eExit on command error-gExit when output changes-cInterpret ANSI colors-xPass command to execCommon Examples
watch df -hRefresh disk space every 2s
watch -n 5 free -mRefresh memory every 5s
watch -d nvidia-smiHighlight GPU changes
watch "ps aux | grep nginx"Monitor nginx process
watch -t dateShow time without header
watch -g "ls -l output.txt"Exit when file changes
watch -n 1 -d "ss -tlnp"Monitor ports with changes
watch -n 10 "curl -s http://localhost/health"Periodic health check
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