CheatSheet: New Systemd Cheatsheet (#4024)
* new systemd cheatsheet * small description change and some editing to avoid duplication * adds aliases * fixes the typo * small nit fixmaster
Aditya Tandon
PJ Hampton
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4c081b9598
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125722d95e
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{
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"id": "systemd_cheat_sheet",
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"name": "Systemd",
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"description": "Mantains the system or user services",
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"metadata": {
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"sourceName": "Cheatography",
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"sourceUrl": "https://www.cheatography.com/tme520/cheat-sheets/systemd/"
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},
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"aliases": [
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"systemctl",
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"system services",
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"system service",
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"system manager"
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],
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"template_type": "terminal",
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"section_order": [
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"Services Management",
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"Investigate and Logs",
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"System State"
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],
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"sections": {
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"Services Management": [
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{
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"key": "systemctl start <SERVICE>",
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"val": "Start a SERVICE (not reboot persistent) Ex: systemctl start httpd.service"
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},
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{
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"key": "systemctl stop <SERVICE>",
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"val": "Stop a SERVICE (not reboot persistent) Ex: systemctl stop httpd.service"
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},
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{
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"key": "systemctl restart <SERVICE>",
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"val": "Restart a SERVICE Ex: systemctl restart httpd.service"
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},
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{
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"key": "systemctl reload <SERVICE>",
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"val": "Reloads the configuration files without interrupting pending operations Ex: systemctl reload httpd.service"
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},
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{
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"key": "systemctl condrestart <SERVICE>",
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"val": "Restarts if the SERVICE is already running Ex: systemctl condrestart httpd.service"
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},
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{
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"key": "systemctl status <SERVICE>",
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"val": "Shows the status of a SERVICE Ex: systemctl status httpd.service"
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},
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{
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"key": "systemctl list-units --type=service",
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"val": "Displays the status of all services"
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},
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{
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"key": "systemctl list-unit-files --type=service",
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"val": "List the services that can be started or stopped"
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},
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{
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"key": "ls /etc/systemd/system/*.wants/",
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"val": "Print a list of services (alternative)"
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},
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{
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"key": "systemctl enable <SERVICE>",
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"val": "Start SERVICE at next boot Ex: systemctl enable httpd.service"
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},
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{
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"key": "systemctl disable <SERVICE>",
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"val": "SERVICE won't be started on next boot Ex: systemctl disable httpd.service"
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},
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{
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"key": "systemctl is-enabled <SERVICE>",
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"val": "Check if a SERVICE is configured to start in the current environment Ex: systemctl is-enabled httpd.service"
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},
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{
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"key": "systemctl daemon-reload",
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"val": "Run this command after a change in any configuration file (old or new)"
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},
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{
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"key": "systemctl -H <HOST> status network",
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"val": "Run any systemctl command remotely"
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}
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],
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"Investigate and Logs": [
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{
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"key": "systemctl get-default",
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"val": "Determine which target unit is used by default."
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},
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{
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"key": "systemctl set-default multi-user.target",
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"val": "Change default boot target to multi-user.target"
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},
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{
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"key": "journalctl -b",
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"val": "Show all messages from last boot"
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},
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{
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"key": "journalctl -b -p err",
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"val": "Show all messages of priority level ERROR and more from last boot"
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},
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{
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"key": "journalctl -f",
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"val": "Follow messages as they appear"
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},
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{
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"key": "journalctl -k",
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"val": "Show only kernal messages"
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},
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{
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"key": "journalctl -u <SERVICE>",
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"val": "Show logs for SERVICE"
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},
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{
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"key": "journalctl --full",
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"val": "Display all messages without truncating any"
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},
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{
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"key": "systemctl --state=failed",
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"val": "Display the services that failed to start"
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},
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{
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"key": "systemctl list-units --type=target",
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"val": "Show current runlevel"
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},
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{
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"key": "systemctl isolate graphical.target",
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"val": "Change the current runlevel (target)"
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},
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{
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"key": "systemctl emergency",
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"val": "Switch to Emergency mode (single user)"
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},
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{
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"key": "systemctl kill <SERVICE>",
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"val": "Gently kill SERVICE (SIGTERM, 15)"
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},
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{
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"key": "systemd-cgls",
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"val": "Show the full systemd control group (cgroup) hierarchy as a tree"
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},
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{
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"key": "systemctl list-jobs",
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"val": "Show jobs"
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},
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{
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"key": "systemctl list-dependencies",
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"val": "Show units and its dependencies"
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}
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],
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"System State": [
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{
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"key": "systemctl halt",
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"val": "Halts the system"
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},
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{
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"key": "systemctl poweroff",
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"val": "Powers off the system"
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},
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{
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"key": "systemctl reboot",
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"val": "Restarts the system"
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},
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{
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"key": "systemctl suspend",
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"val": "Suspends the system"
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},
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{
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"key": "systemctl hibernate",
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"val": "Hibernates the system"
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},
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{
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"key": "systemctl hybrid-sleep",
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"val": "Hibernates and suspend the system"
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}
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]
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}
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}
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