How To Install gdm3 on Ubuntu 20.04
Introduction
In this tutorial we learn how to install gdm3 on Ubuntu 20.04.
What is gdm3
gdm3 is:
GDM provides the equivalent of a “login:” prompt for X displays: it asks for a login and starts graphical sessions.
It supports multiple seats and switching between multiple users.
The greeter is based on the GNOME libraries and applications, and its look and design are the same as those of a GNOME session. Task: ubuntu-desktop-minimal, ubuntu-desktop
Package: gdm3 Status: install ok installed Priority: optional Section: gnome Installed-Size: 1860 Maintainer: Ubuntu Developers [email protected] Architecture: amd64 Version: 3.36.3-0ubuntu0.20.04.3 Provides: x-display-manager Depends: accountsservice (>= 0.6.35), adduser, bash (>= 4.3), dconf-cli (>= 0.20), dconf-gsettings-backend (>= 0.20), dbus, gir1.2-gdm-1.0 (= 3.36.3-0ubuntu0.20.04.3), gnome-session | x-session-manager | x-window-manager | x-terminal-emulator, gnome-session-bin (>= 3.10), gnome-settings-daemon (>= 3.24), gnome-shell (>= 3.19.92), gsettings-desktop-schemas, libgdm1 (= 3.36.3-0ubuntu0.20.04.3), libglib2.0-bin (>= 2.35.0), libpam-modules (>= 0.72-1), libpam-runtime (>= 0.76-13.1), libpam-systemd, librsvg2-common, lsb-base (>= 3.2-14), policykit-1 (>= 0.105-5~), procps, ucf, x11-common (>= 1:7.6+11), x11-xserver-utils, debconf (>= 0.5) | debconf-2.0, libaccountsservice0 (>= 0.6.37), libaudit1 (>= 1:2.2.1), libc6 (>= 2.14), libcanberra-gtk3-0 (>= 0.25), libcanberra0 (>= 0.2), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.44.0), libgtk-3-0 (>= 3.0.0), libgudev-1.0-0 (>= 165), libkeyutils1 (>= 1.5.9), libpam0g (>= 0.99.7.1), libselinux1 (>= 1.32), libsystemd0, libwrap0 (>= 7.6-4~), libx11-6, libxau6, libxcb1, libxdmcp6 Recommends: at-spi2-core, libpam-fprintd (>= 0.8.0-2), x11-xkb-utils, xserver-xephyr, xserver-xorg, zenity Suggests: gnome-orca, libpam-gnome-keyring Breaks: pulseaudio (« 11.1-2), xserver-xorg-core (« 2:1.17.2-2~) Conffiles: /etc/dbus-1/system.d/gdm.conf 04171376f385fd33eade3368b8cd4082 /etc/gdm3/Init/Default cf4415ad9808ef0096a8b7852ddea7ca /etc/gdm3/PostLogin/Default.sample ea12aa729c8c6c09ac7643f0dfba5726 /etc/gdm3/PostSession/Default faa25c6c7940f930d70538c673a39726 /etc/gdm3/PreSession/Default 230165e8c40035a23a4a053a98d32ea6 /etc/gdm3/Prime/Default f13634ea87f90dde2bec58dd26c7f49e /etc/gdm3/PrimeOff/Default 1f9f942f3d7e4cdb5b287cdde8494c59 /etc/gdm3/Xsession d0867071ba587630013c7009a9ffe813 /etc/gdm3/config-error-dialog.sh cf624deb2a10a42603daf49f66d35d1e /etc/gdm3/custom.conf c6aca2790519798ce963b8b3254e22b3 /etc/init.d/gdm3 9932c03664a6acd9f23afdbcf91478cb /etc/insserv.conf.d/gdm3 61c8ab53b1be0158ef1ac24492e4543a /etc/pam.d/gdm-autologin 984f197ed79c28ba0131a51b7291aa42 /etc/pam.d/gdm-fingerprint 961bb460f45aac79d5c3f84505936382 /etc/pam.d/gdm-launch-environment 0803541abf05a0295ac5cf789f912155 /etc/pam.d/gdm-password 1af84655e3a912c2b7b3502188036f36 Description-en: GNOME Display Manager GDM provides the equivalent of a “login:” prompt for X displays: it asks for a login and starts graphical sessions.
It supports multiple seats and switching between multiple users.
The greeter is based on the GNOME libraries and applications, and its look and design are the same as those of a GNOME session. Original-Maintainer: Debian GNOME Maintainers [email protected]
Package: gdm3 Architecture: amd64 Version: 3.36.3-0ubuntu0.20.04.2 Priority: optional Section: gnome Origin: Ubuntu Maintainer: Ubuntu Developers [email protected] Original-Maintainer: Debian GNOME Maintainers [email protected] Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 1860 Provides: x-display-manager Depends: accountsservice (>= 0.6.35), adduser, bash (>= 4.3), dconf-cli (>= 0.20), dconf-gsettings-backend (>= 0.20), dbus, gir1.2-gdm-1.0 (= 3.36.3-0ubuntu0.20.04.2), gnome-session | x-session-manager | x-window-manager | x-terminal-emulator, gnome-session-bin (>= 3.10), gnome-settings-daemon (>= 3.24), gnome-shell (>= 3.19.92), gsettings-desktop-schemas, libgdm1 (= 3.36.3-0ubuntu0.20.04.2), libglib2.0-bin (>= 2.35.0), libpam-modules (>= 0.72-1), libpam-runtime (>= 0.76-13.1), libpam-systemd, librsvg2-common, lsb-base (>= 3.2-14), policykit-1 (>= 0.105-5~), procps, ucf, x11-common (>= 1:7.6+11), x11-xserver-utils, debconf (>= 0.5) | debconf-2.0, libaccountsservice0 (>= 0.6.37), libaudit1 (>= 1:2.2.1), libc6 (>= 2.14), libcanberra-gtk3-0 (>= 0.25), libcanberra0 (>= 0.2), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.44.0), libgtk-3-0 (>= 3.0.0), libgudev-1.0-0 (>= 165), libkeyutils1 (>= 1.5.9), libpam0g (>= 0.99.7.1), libselinux1 (>= 1.32), libsystemd0, libwrap0 (>= 7.6-4~), libx11-6, libxau6, libxcb1, libxdmcp6 Recommends: at-spi2-core, libpam-fprintd (>= 0.8.0-2), x11-xkb-utils, xserver-xephyr, xserver-xorg, zenity Suggests: gnome-orca, libpam-gnome-keyring Breaks: pulseaudio (« 11.1-2), xserver-xorg-core (« 2:1.17.2-2~) Filename: pool/main/g/gdm3/gdm3_3.36.3-0ubuntu0.20.04.2_amd64.deb Size: 260132 MD5sum: a9006dbabfda7a31325761b30cf5267c SHA1: a6fea628fe680caf6fbace9c198723f09fb392ff SHA256: 06578cadef93584338da7138d783f77e01498001f805b4f9a9601de8bf6c2af8 SHA512: 7763bb03ae121091b11d82194bcd713f92f33ea2fa61f6bfe0f854132567315c5e1b3844c666509d6b2d5319ae89000c6d68a1c2e1ca3e7bd783582b8e7f353f Description-en: GNOME Display Manager GDM provides the equivalent of a “login:” prompt for X displays: it asks for a login and starts graphical sessions.
It supports multiple seats and switching between multiple users.
The greeter is based on the GNOME libraries and applications, and its look and design are the same as those of a GNOME session. Task: ubuntu-desktop-minimal, ubuntu-desktop
Package: gdm3 Architecture: amd64 Version: 3.34.1-1ubuntu1 Priority: optional Section: gnome Origin: Ubuntu Maintainer: Ubuntu Developers [email protected] Original-Maintainer: Debian GNOME Maintainers [email protected] Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 1852 Provides: x-display-manager Depends: accountsservice (>= 0.6.35), adduser, bash (>= 4.3), dconf-cli (>= 0.20), dconf-gsettings-backend (>= 0.20), gir1.2-gdm-1.0 (= 3.34.1-1ubuntu1), gnome-session | x-session-manager | x-window-manager | x-terminal-emulator, gnome-session-bin (>= 3.10), gnome-settings-daemon (>= 3.24), gnome-shell (>= 3.19.92), gsettings-desktop-schemas, libgdm1 (= 3.34.1-1ubuntu1), libglib2.0-bin (>= 2.35.0), libpam-modules (>= 0.72-1), libpam-runtime (>= 0.76-13.1), libpam-systemd, librsvg2-common, lsb-base (>= 3.2-14), policykit-1 (>= 0.105-5~), procps, ucf, x11-common (>= 1:7.6+11), x11-xserver-utils, debconf (>= 0.5) | debconf-2.0, libaccountsservice0 (>= 0.6.37), libaudit1 (>= 1:2.2.1), libc6 (>= 2.14), libcanberra-gtk3-0 (>= 0.25), libcanberra0 (>= 0.2), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.44.0), libgtk-3-0 (>= 3.0.0), libgudev-1.0-0 (>= 165), libkeyutils1 (>= 1.5.9), libpam0g (>= 0.99.7.1), libselinux1 (>= 1.32), libsystemd0, libwrap0 (>= 7.6-4~), libx11-6, libxau6, libxcb1, libxdmcp6 Recommends: at-spi2-core, libpam-fprintd (>= 0.8.0-2), x11-xkb-utils, xserver-xephyr, xserver-xorg, zenity Suggests: gnome-orca, libpam-gnome-keyring Breaks: pulseaudio (« 11.1-2), xserver-xorg-core (« 2:1.17.2-2~) Filename: pool/main/g/gdm3/gdm3_3.34.1-1ubuntu1_amd64.deb Size: 261480 MD5sum: cf29c98fabe63a93b7482828963251ae SHA1: bc7afdab7293e96096099b2894d160fd879205d4 SHA256: 7f9e73ad69a4d2546e17dfdfbc436be089b016b4caf2c7ed7c63c028c4abe10f Description-en: GNOME Display Manager GDM provides the equivalent of a “login:” prompt for X displays: it asks for a login and starts graphical sessions.
It supports multiple seats and switching between multiple users.
The greeter is based on the GNOME libraries and applications, and its look and design are the same as those of a GNOME session. Task: ubuntu-desktop-minimal, ubuntu-desktop
There are three methods to install gdm3 on Ubuntu 20.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install gdm3 Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install gdm3 using apt-get by running the following command:
sudo apt-get -y install gdm3
Install gdm3 Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install gdm3 using apt by running the following command:
sudo apt -y install gdm3
Install gdm3 Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install gdm3 using aptitude by running the following command:
sudo aptitude -y install gdm3
How To Uninstall gdm3 on Ubuntu 20.04
To uninstall only the gdm3 package we can use the following command:
sudo apt-get remove gdm3
Uninstall gdm3 And Its Dependencies
To uninstall gdm3 and its dependencies that are no longer needed by Ubuntu 20.04, we can use the command below:
sudo apt-get -y autoremove gdm3
Remove gdm3 Configurations and Data
To remove gdm3 configuration and data from Ubuntu 20.04 we can use the following command:
sudo apt-get -y purge gdm3
Remove gdm3 configuration, data, and all of its dependencies
We can use the following command to remove gdm3 configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge gdm3
References
Summary
In this tutorial we learn how to install gdm3 package on Ubuntu 20.04 using different package management tools: apt, apt-get and aptitude.
