Server Is Running Out of Disk Space

A full disk can cause applications to crash and the system to become unstable.

Check Disk Usage

df -h

Find Large Files

du -h --max-depth=1 / | sort -rh | head -20

Common Culprits

• Log files: du -sh /var/log — clean with journalctl --vacuum-size=100M
• Package cache: apt clean or dnf clean all
• Old kernels: apt autoremove -y
• Docker images: docker system prune -a
• Temp files: rm -rf /tmp/*

Prevention

• Set up log rotation
• Monitor disk usage with alerts
• Clean up unused Docker images regularly