Limit process resources (cgroup)

Run a command in a transient systemd scope with resource limits

systemd-run --scope -p MemoryMax=512M -p CPUQuota=50% -- ./heavy.sh
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linux133 commands
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linuxperformancecgroups

More linux commands

  • Query journald with time range
    journalctl --since '2024-01-15 10:00' --until '2024-01-15 10:30' -u nginx

    Logs for nginx between two timestamps

  • Export journald to JSON
    journalctl -u <service> -o json | jq '{ts: .REALTIME_TIMESTAMP, msg: .MESSAGE}'

    Structured log export for ingestion into log aggregators

  • Show NTP sync status
    timedatectl status && chronyc tracking

    Clock sync state, offset, and NTP source details

  • Check systemd timers
    systemctl list-timers --all --no-pager

    All timers with last/next trigger times

  • Copy SSH public key
    ssh-copy-id -i ~/.ssh/id_ed25519.pub user@host

    Append public key to remote authorized_keys

all 133 linux commands