An alert came: disk space on /var is running out on the server. What will you do?

In case of a disk space shortage on /var, I would proceed as follows:

1. Check current usage:

df -h /var
du -sh /var/*

2. Identify large files and directories:

find /var -type f -size +100M

3. Check logs: logs may occupy a lot of space, especially if rotation is not configured.

4. Remove unnecessary files: old logs, temporary files, caches.

5. Configure or check logrotate: to prevent future overflow.

6. If space is critical: consider increasing the partition or moving data to another disk.

7. Monitoring: set up alerts and automatic cleanup to prevent recurrence.