Tools › Cheat sheets › System Administration
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System Administration cheat sheets
Services, logs, packages, users, disks, processes and scheduled jobs.
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systemctlStart, stop, enable and inspect systemd services.
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journalctlRead and filter systemd logs.
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aptInstall, update and remove packages on Debian and Ubuntu.
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dnf / yumInstall, update and query packages on Fedora, RHEL, Rocky and Alma.
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Users & groupsCreate users, manage groups and set ownership.
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Processes & performanceInspect, signal and tune running processes.
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Disks & storageCheck space, mount filesystems and inspect devices.
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rsyncCopy and synchronise files locally and over SSH.
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Cron expressionsCopy-paste cron schedules explained.