Cron Not Running?
Quick fixes for cron jobs that aren't executing at all.
Problem: Your cron job isn't running at all? Follow this checklist to identify and fix the issue.
Quick Checks
1. Is cron daemon running?
# Check if crond is running
ps aux | grep cron | grep -v grep
systemctl status cron # or crond
If not running: sudo systemctl start cron
2. Is your job in crontab?
crontab -l
If empty or missing: Add your job with crontab -e
3. Check permissions
# Check if user is allowed to use cron
ls -la /etc/cron.allow /etc/cron.deny
Common Solutions
✅ Start Cron Service
# Ubuntu/Debian
sudo systemctl start cron
sudo systemctl enable cron
# CentOS/RHEL
sudo systemctl start crond
sudo systemctl enable crond
✅ Fix PATH Issues
# Add to top of crontab
PATH=/usr/local/bin:/usr/bin:/bin
# Use full paths in commands
0 1 * * * /usr/bin/python3 /home/user/script.py
✅ Fix Permissions
# Make script executable
chmod +x /path/to/your/script.sh
# Check file ownership
ls -la /path/to/your/script.sh