Change process priority linux
Lower priority (nice +10) of a running process
renice -n 10 -p <pid>
more linux
all 133 commands →
Limit process resources (cgroup)
systemd-run --scope -p MemoryMax=512M -p CPUQuota=50% -- ./heavy.sh
Query journald with time range
journalctl --since '2024-01-15 10:00' --until '2024-01-15 10:30' -u nginx
Export journald to JSON
journalctl -u <service> -o json | jq '{ts: .REALTIME_TIMESTAMP, msg: .MESSAGE}'
Show NTP sync status
timedatectl status && chronyc tracking
Check systemd timers
systemctl list-timers --all --no-pager