system-admin

name	system-admin
description	System administration — manage services, processes, cron, systemd, networking. Use for any sysadmin task.
category	system
maturity	stable
tags	["systemd","cron","process-management","networking","journalctl"]

System Administration

Systemd User Services

# List running user services
systemctl --user list-units --state=running --no-pager

# Start/stop/restart
systemctl --user start SERVICE
systemctl --user stop SERVICE
systemctl --user restart SERVICE

# Enable at boot
systemctl --user enable SERVICE

# Check logs
journalctl --user -u SERVICE --since "1 hour ago" --no-pager

# Reload after editing .service file
systemctl --user daemon-reload

Key Services

• openclaw-poe-gateway — Poe autonomous agent
• openclaw-argus-gateway — Argus analytical agent
• claudex — This Claude Code instance (when running via systemd)

Process Management

# Find process
pgrep -fa "pattern"

# Background with setsid (survives terminal close)
setsid command &

# Kill gracefully
kill PID       # SIGTERM
kill -9 PID    # SIGKILL (last resort)

Cron

# Edit crontab
crontab -e

# List current cron jobs
crontab -l

# Common patterns
# Every 5 minutes: */5 * * * *
# Daily at 9am:    0 9 * * *
# Weekly Monday:   0 9 * * 1

Networking

# Check ports
ss -tlnp | grep PORT

# Test connectivity
curl -s -o /dev/null -w "%{http_code}" URL

# DNS lookup
dig HOSTNAME +short