Ubuntu 24.04
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Change Run-Level2024/05/08

 
If you would like to change System Run-Level, set like follows.
[1] Run-Level is set with linking to [/etc/systemd/system/default.target].
For example, the default setting without GUI is set like follows.
root@dlp:~#
systemctl get-default

multi-user.target
root@dlp:~#
ll /etc/systemd/system/default.target

lrwxrwxrwx 1 root root 41 May 8 14:01 /etc/systemd/system/default.target -> /usr/lib/systemd/system/multi-user.target
root@dlp:~#
ll /usr/lib/systemd/system/multi-user.target

-rw-r--r-- 1 root root 540 Feb 28 02:26 /usr/lib/systemd/system/multi-user.target
[2] For example, if you'd like to change Run-Level to Graphical-Login, set like follows.
On Ubuntu and other Debian based System, Graphical-Login is enabled automatically when installing Desktop Environment packages, however if you'd like to disable Graphical-Login by default, specify [multi-user.target].
root@dlp:~#
systemctl set-default graphical.target

Removed "/etc/systemd/system/default.target".
Created symlink /etc/systemd/system/default.target → /usr/lib/systemd/system/graphical.target.
root@dlp:~#
systemctl get-default

graphical.target
root@dlp:~#
ll /etc/systemd/system/default.target

lrwxrwxrwx 1 root root 40 May 8 14:04 /etc/systemd/system/default.target -> /usr/lib/systemd/system/graphical.target
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