Check high disk I/O commands:
- iotop -oPa -d 2: High I/O on /var partition
- glances: High iowait and load
- iostat -2: /var high I/O confirmation
- ls -lhS /var/log/*log | head: Large mail.log
- tail -f /var/log/mail.log: Rapid, continuous logging
Check high disk I/O commands: