Inspect cgroup hierarchy linux

Count lines in all logs find /var/log -name '*.log' -exec wc -l {} + | sort -rn | head -20 Follow multiple log files tail -f /var/log/syslog /var/log/auth.log Search compressed logs zgrep -i 'error' /var/log/syslog.*.gz Rotate logs manually logrotate -f /etc/logrotate.conf List cron jobs system-wide for u in $(cut -f1 -d: /etc/passwd); do crontab -l -u $u 2>/dev/null | grep -v '^#' | sed "s|^|$u: |"; done