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https://github.com/chubin/cheat.sheets
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46 lines
4.1 KiB
Plaintext
46 lines
4.1 KiB
Plaintext
# SysVinit to Systemd Cheatsheet
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# Services
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#-------------------------------------------------------------------------------------------------------------------------------------------------
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# Sysvinit Command Systemd Command Notes
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#-------------------------------------------------------------------------------------------------------------------------------------------------
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# service frobozz start systemctl start frobozz Used to start a service (not reboot persistent)
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# service frobozz stop systemctl stop frobozz Used to stop a service (not reboot persistent)
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# service frobozz restart systemctl restart frobozz Used to stop and then start a service
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# service frobozz reload systemctl reload frobozz When supported, reloads the config file without interrupting pending operations.
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# service frobozz condrestart systemctl condrestart frobozz Restarts if the service is already running.
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# service frobozz status systemctl status frobozz Tells whether a service is currently running.
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# ls /etc/rc.d/init.d/ systemctl Used to list the services that can be started or stopped
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# (or) systemctl list-unit-files --type=service
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# (or) ls /lib/systemd/system/*.service /etc/systemd/system/*.service
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# chkconfig frobozz on systemctl enable frobozz Turn the service on, for start at next boot, or other trigger.
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# chkconfig frobozz off systemctl disable frobozz Turn the service off for the next reboot, or any other trigger.
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# chkconfig frobozz systemctl is-enabled frobozz Used to check whether a service is configured to start or not in the current environment.
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# chkconfig --list systemctl list-unit-files --type=service
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# (or) ls /etc/systemd/system/*.wants/
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# Print a table of services that lists which runlevels each is configured on or off
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# chkconfig --list | grep 5:on systemctl list-dependencies graphical.target
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# Print a table of services that will be started when booting into graphical mode
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# chkconfig frobozz --list ls /etc/systemd/system/*.wants/frobozz.service
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# Used to list what levels this service is configured on or off
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# chkconfig frobozz --add systemctl daemon-reload Used when you create a new service file or modify any configuration
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# SysVinit to Systemd Cheatsheet
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# Runlevels/targets
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#--------------------------------------------------------------------------------------------------------------------------------------------------
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# Sysvinit Runlevel Systemd Target Notes
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#--------------------------------------------------------------------------------------------------------------------------------------------------
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# 0 runlevel0.target Halt the system.
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# poweroff.target
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# 1, s, single runlevel1.target Single user mode.
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# rescue.target
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# 2, 4 runlevel2.target User-defined/Site-specific runlevels. By default, identical to 3.
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# runlevel4.target
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# multi-user.target
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# 3 runlevel3.target Multi-user, non-graphical. Users can usually login via multiple consoles or via the network.
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# multi-user.target
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# 5 runlevel5.target Multi-user, graphical. Usually has all the services of runlevel 3 plus a graphical login.
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# graphical.target
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# 6 runlevel6.target Reboot
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# reboot.target
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# emergency emergency.target Emergency shell
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