Ubuntu systemctl command and Mode switch

Reprint http://blog.csdn.net/jun2016425/article/details/53100963/

1. vim/etc/default/Grub        #GRUB_CMDLINE_LINUX_DEFAULT="quiet Splash"          grub_cmdline_linux="text"        # Uncomment to disable Graphical Terminal (Grub-pc only)        grub_terminal=console2. update-  Grub3. Systemctl set-default multi-4. Systemctl Start LIGHTDM

Reprint http://blog.csdn.net/zhengjie19/article/details/49069767

This article records some common uses of systemd, most of which I will use myself.

2. Startup level Configuration
   Because of the work needs, often in the virtual machine installed all kinds of Linux systems, and most of the time, we need just a text interface, can be through the host SSH to the VM, the graphical interface does not need to play, wasted CPU and memory, through the SYSTEMCTL command configuration by default into the text interface, Just one line:

   Systemctl Set-default Multi-user.target

   If you want to cut back to the graphical interface, the corresponding:

   Systemctl Set-default Graphical.target

4. Start Service on Boot

   Systemctl Enable ***.service

6. Stop the boot start service

   Systemctl Disable ***.service

8. Start/stop/Restart service

   Systemctl Start/stop/restart ***.service

10. Querying service Status

    Systemctl Status ***.service

12. Execute commands on the remote machine, like SSH [email protected] ""

    systemctl-h [email protected]

14. Lists the system services, and the TAB key can be used to correlate all supported unit types

    SYSTEMCTL-T Service

16. Lists the status of all loaded units

    Systemctl-a

18. List the loaded units/sockets/timers

    Systemctl list-units [Pattern]
    Systemctl list-sockets [Pattern]
    Systemctl list-timers [Pattern]

20. Query whether a service is active, take sshd.serice as an example

    Systemctl is-active Sshd.service

22. View the configuration file for a service directly, take Sshd.serice as an example

    Systemctl Cat Sshd.service

24. View the dependencies of a service, take Sshd.serice as an example

    Systemctl list-dependencies Sshd.service

26. View environment variables

    Systemctl show-environment

Ubuntu systemctl command and Mode switch