Login or display manager is an interface for users to login to their Linux
system. There are multiple login managers to choose from and different Linux
distribution choose different login manager for the system.
The default display/login manager for Ubuntu
/GNOME
is GDM
. Kubuntu
however uses SDDM
as the default display/login manager.
If you have multiple display manager installed on your system, you can change the one used when logging in to your system.
$ systemctl status display-manager ● gdm.service - GNOME Display Manager Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor preset: enabled) Active: active (running) since Sat 2020-08-15 07:49:29 +08; 1 day 13h ago Process: 11141 ExecReload=/usr/share/gdm/generate-config (code=exited, status=0/SUCCESS) Process: 11143 ExecReload=/bin/kill -SIGHUP $MAINPID (code=exited, status=0/SUCCESS) Main PID: 919 (gdm3) Tasks: 3 (limit: 4624) Memory: 7.5M CGroup: /system.slice/gdm.service └─919 /usr/sbin/gdm3 Ogos 15 07:49:29 host gdm-launch-environment][935]: pam_unix(gdm-launch-environment:session): session opened for user gdm by (uid=0) Ogos 15 07:49:45 host gdm-password][1453]: pam_unix(gdm-password:auth): Couldn't open /etc/securetty: No such file or directory Ogos 15 07:49:46 host gdm-password][1453]: pam_unix(gdm-password:auth): Couldn't open /etc/securetty: No such file or directory Ogos 15 07:49:46 host gdm-password][1453]: gkr-pam: unable to locate daemon control file Ogos 15 07:49:46 host gdm-password][1453]: gkr-pam: stashed password to try later in open session Ogos 15 07:49:46 host gdm-password][1453]: pam_unix(gdm-password:session): session opened for user user by (uid=0) Ogos 15 07:49:47 host gdm-password][1453]: gkr-pam: gnome-keyring-daemon started properly and unlocked keyring Ogos 15 07:49:55 host gdm3[919]: Child process -998 was already dead. Ogos 16 21:37:24 host systemd[1]: Reloading GNOME Display Manager. Ogos 16 21:37:24 host systemd[1]: Reloaded GNOME Display Manager.
dpkg-reconfigure
to configure default desktop manager. $ sudo dpkg-reconfigure gdm3 [sudo] password for user:
<tab>
key to navigate to the Ok
button and press [ENTER]
. <tab>
key to navigate to the Ok
button and press [ENTER]
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