To disable the hot corner functionality for a single user, you can use either the dconf Editor application or the gsettings command-line utility. To disable the hot corner functionality using the dconf Editor application, follow this procedure. The dconf Editor application is installed on the system:. Set enable-hot-corners to False.
Clicking the line with enable-hot-corners , and proceeding to a new window. To disable the hot corner functionality using the gsettings command-line utility, follow this procedure. With the GNOME Shell extension called No topleft hot corner provided by the gnome-shell-extension-no-hot-corner package, you can disable the hot corner feature system-wide. The gnome-shell-extension-no-hot-corner package is installed on the system:. Enable the No topleft hot corner extension by switching it on in the Tweaks tool.
For more information on how to use Tweaks , see Section 1. PulseAudio lets programs output the audio using the pulseaudio daemon. System menu is located in the top-right screen corner.
It enables you only to set the intensity of the sound output or sound input through the sound bar. The sound bar for input sound is available only if you are running an application that is using an internal microphone built-in audio , such as some teleconference tools. Tweaks enables you to configure only volume over-amplification.
You can use one of the approaches described in Section 1. Alternatively, you can also launch it from the System menu by clicking on its icon. The Output and Input menus show only the built-in audio devices unless you connect any external device that can handle sound. The Output menu enables you to select the required profile from available analog or digital profiles that are displayed depending on available output devices.
Use one of the approaches described in Section 1. Select one of the available printers including also network printers , or enter printer IP address or the hostname of a printer server. Click the "settings" button on the right to display a settings menu for the selected printer:. This option enables you to select a suitable driver from databases that have already been installed on the system. This option enables you to select from a list of available postscript printer description PPD files that can be used as a driver for your printer.
Click Use Printer by Default to set the selected printer as the default printer:. Click Remove Printer to remove the selected printer:. This section describes how to print a test page to make sure that the printer functions properly. Red Hat Enterprise Linux 8 includes the PipeWire media server, which ensures access to multimedia devices and media sharing between applications. The functionality of remote desktop session is provided by the gnome-remote-desktop and pipewire packages.
Org , just VNC is needed to run a remote desktop session. This functionality on X. Org is provided by the vino package. In such case, the pipewire service is activated automatically when you start sharing your screen within the teleconference tool. Chapter 1. GNOME environments, back ends, and display protocols. The X11 protocol, which uses X. Press the Super key to open the window overview.
In the overview, check that: The Dash the vertical panel on the left side of the screen is displayed. The bottom panel is not displayed. The workspace switcher is displayed on the right side of the screen. Window overview with "hasOverview": true. The Dash is not displayed. Window overview with "hasOverview": false. Graphics back ends in RHEL 8.
X11 The X11 protocol uses X. Displaying graphics based on this protocol works the same way as in RHEL 7, where this was the only option. Displaying graphics based on the Wayland protocol has some differences and limitation compared to X For additional information on the Wayland project, see Wayland documentation.
Key differences between the Wayland and X11 protocol. X11 applications Client applications need to be ported to the Wayland protocol or use a graphical toolkit that has a Wayland backend, such as GTK, to be able to work natively with the compositor and display server based on Wayland. Org libinput driver for these devices.
Org evdev driver, which was used in Red Hat Enterprise Linux 7, is available as fallback where required. Org libinput driver for touchpads. Org synaptics driver, which was used for touchpads in Red Hat Enterprise Linux 7, is no longer available. Org wacom driver, which was used for tablet devices in Red Hat Enterprise Linux 7.
However, the X. Org libinput driver is available where required. Org evdev driver for other input devices that are not included in the above categories. Red Hat Enterprise Linux 8 uses the X. Org libinput driver by default but can fall back to the X.
Org evdev driver if a device is incompatible with libinput. Switching workspaces by dragging up or down with four fingers. Opening the Activities overview by bringing three fingers closer together. Current Wayland limitations. Org screen manipulation utilities are not available.
The xrandr utility is not supported because Wayland handles layout, rotations, and resolutions differently. Due to stability issues, using X. The graphics based on the Wayland protocol are not available for virtual machines that use the qxl driver. Wayland does not support the custom or niche input devices that cannot be handled by the libinput driver.
Chapter 3. Prerequisites You have administrator permissions on the system. Developer Tools Utilities. Installing an application to open a file type. Procedure Try opening a file that is associated with an application that is currently not installed on your system.
GNOME automatically identifies the suitable application that can open the file, and offers to download the application. Procedure Download the required RPM package. Procedure Open the Activities Overview screen. Click the icon of the application again. For installing software on the command line, see Installing software with yum. Chapter 4. Activation Key or keys, if you are registering the system with activation key A registration server, if you are registering system using the registration server.
Prerequisites A valid account on Red Hat customer portal. Procedure Go to the system menu , which is accessible from the top-right screen corner and click the Settings icon. Select Registration Server. Enter the name of your organization in the Organization field.
Prerequisites Activation key or keys. In the Registration Type menu, select Activation Keys. Separate multiple keys by a comma ,.
Enter the name or ID of your organization in the Organization field. Click Unregister. A warning appears about the impact of unregistering the system. Depending on the session type, this method uses different components to implement screen sharing: In an X11 session, it uses the vino component. Remotely accessing the desktop as a single user. Navigate to the Sharing menu: Click Screen Sharing.
The screen sharing configuration opens: Click the switch button in the window header to enable screen sharing: Select the Allow connections to control the screen check box. Under Access Options , select the Require a password option. The desktop sharing is enabled on the server. For details, see Section 5. Click Connect. In the Protocol menu, select VNC. Verification steps On the client, check that you can see the shared server desktop. On the server, a screen sharing indicator appears on the right side of the top panel: You can control the screen sharing in the system menu.
For example: On the client, configure the port forwarding: ssh -N -T -L server-ip-address Connect to the VNC session on the localhost address. Remotely accessing the desktop as multiple users. The mapping of port and display numbers to users in VNC. The recommended mapping Red Hat recommends that you start with port number and display number 2 for the first user, and increment the numbers by one for each additional server user.
Table 5. Firewall rules You must open the selected ports in your firewall configuration. The priority of configuration files The VNC server reads the following files for general options, in order from most important to least important:. Additional resources For a list of available configuration options, see the Xvnc 1 man page.
Enabling multi-user VNC access on the server. Procedure Install the VNC server: [root] yum install tigervnc-server Map users to display and port numbers. Replace user-name with the user name of the selected existing user. Multiple users can connect to the VNC server at the same time. Reboot the server. Connecting to the VNC server as multiple users. Prerequisites Remote desktop access for multiple users is enabled on the server.
Replace display with the display number where the server user exports the VNC session. Remotely accessing an individual application. Enabling X11 forwarding on the server. Launching an application remotely using X11 forwarding. Prerequisites X11 forwarding over SSH is enabled on the server.
On Microsoft Windows, install an X11 server such as Xming. Administrators can define default settings that apply to all users. Users can override the defaults with their own settings. Administrators can also lock settings to prevent users from overriding them. Displaying GSettings values for desktop applications. Prerequisites The dconf-editor is not installed on the system by default. To install it, run the following command as the root user: yum install dconf-editor. Additional resources For more information on the dconf-editor tool, see the dconf-editor 1 man page and the dconf-editor Project documentation.
For more information on the gsettings utility, see the gsettings 1 man page. If set, dconf attempts to open the profile named in the variable and aborts if this step fails. If not set, dconf attempts to open the profile named user and uses an internal hard-wired configuration if this step fails. Prerequisites the user profile exists the value for the key was added to a dconf database. Procedure For example, to set the default background:. Additional resources If you want to avoid creating a user profile, you can use the dconf command-line utility to read and write individual values or entire directories from and to a dconf database.
For more information, see the dconf 1 man page. Procedure To lock down a GSettings key:. Add any number of files with keys that you want to lock into this directory. Locking the settings for the default wallpaper Set a default wallpaper.
Working with GSettings keys on command line. Checking description of valid key values. Users can set the value of lock-delay as needed. Listing installed non-relocatable schemas. The following list is truncated.
Listing keys in the org. Listing children of the org. Vinagre always-enable-listening false org. Vinagre always-show-tabs false org. Vinagre show-accels false org. Vinagre history-size 15 org. Vinagre shared-flag true. Multipurpose Internet Mail Extension types. Determine which application should open a specific file format by default. Register other applications that can open files of a specific format. Set a string describing the type of a file, for example, in a file properties dialog of the files application.
Set an icon representing a specific file format, for example, in a file properties dialog of the files application. The machine-wide and user-specific location to store all the MIME type specification files. How to register a MIME type so that the desktop environment knows which application you can use to open a specific file format. How users can change which applications should open with what file formats.
Adding a custom MIME type for all users. As a root user, update the MIME database for your changes to take effect. Adding a custom MIME type for individual users. Overriding default registered application for all the users.
Verification steps For these settings to function correctly, ensure that both the myapplication1. Overriding default registered application for individual users.
Customizing the default desktop background. Procedure Use the org. Update the system databases: dconf update Users must log out and back in again before the system-wide settings take effect.
Make sure that you have updated the system databases by running the dconf update command as the root user. Try restarting GDM. Chapter 9. Changing the language using desktop GUI. Prerequisites Required language packages are installed on your system. Select the required region and language from the menu. Click Done. A program caused X. Org to stop working. You need to switch from your logged-in session quickly.
You have launched a program that failed. You cannot operate in the current session. Your screen freezes. Section 9. This is done by removing menu items for those applications. Setting the org. Disabling virtual terminal switching on X. Preventing the computer from suspending when closing the lid. If the line is not present in the file, add it. Replace the default suspend parameter with: lock for the screen to lock ignore for nothing to happen poweroff for the computer to switch off.
Changing behavior when pressing the power button in graphical target mode. Pop-up query for interactive mode. Chapter Enabling Chinese, Japanese, or Korean text input. Procedure Install all available input method packages: yum install input-methods. Prerequisites The input method packages are installed. Procedure Go to the system menu , which is accessible from the top-right screen corner, and click the Settings icon.
Verification Open a text editor. Type text in your language. Verify that the text appears in your native script. Inputting uncommon characters using the Compose key. Enabling the Compose key for an individual user with the Tweaks application. Prerequisites The Tweaks application is installed on your system.
Procedure Open the Tweaks application. Choose which key will be used as the Compose key from the listed keys. Enabling the Compose key for an individual user using GSettings.
Procedure Enable the Compose key and set the compose character to right alt. Enabling the Compose key for all users. Using the Compose key to input characters. Prerequisites The Compose key is enabled on your system. Procedure Press and release the Compose key. Type the key combination to get the specific symbol. Additional resources For more sequences refer to the X.
Typing emoji characters in GTK applications. Prerequisites Make sure that the application is built on the GTK toolkit. Procedure Open a GTK application. Make sure that a text field is active. The emoji selection menu opens. Click the selected character, or navigate to it using the cursor keys and press Enter. Verification Check that the intended emoji character now appears at your cursor.
Typing emoji characters in any applications. Procedure Open an application. Repeatedly press Space to browse the emoji characters that match your keyword. Confirm the selected emoji character by pressing Enter. Procedure Open the Files application. Enter a well-formed URI string. When asked for login credentials, enter your name and password into the relevant entry boxes.
When the mounting process finishes, you can start working with the storage volume. Procedure Click the Eject icon on the chosen mount. Wait until the mount disappears or notification about the safe removal appears.
Commands Description gio cat Displays the content of a file. Additional resources The gio 1 man page. Additional resources The gio man page. Procedure Create an empty file. Move this file to a new location. Additional resources For more information on Passwords and Keys , see the help manual for Passwords and Keys embedded directly in the desktop. Accessing GVFS mounts that require authentication. Fill in the credentials and confirm. Prerequisite You have gvfs-fuse package installed.
Troubleshooting an invisible connected USB disk. Procedure Open the Disks application. If the flash drive is still not visible, you can try to physically remove the drive and try connecting it again. Troubleshooting unknown or unwanted partitions listed in Files. Confirm by clicking OK. Troubleshooting if a connection to the remote GVFS file system is unavailable. The connection is interrupted. For example, your laptop is disconnected from the Wi-Fi.
The user is inactive for some time and is disconnected by the server idle timeout. The computer is resumed from sleep mode. Procedure Unmount file system. Mount it again. Prerequisites The iotop utility is installed. You can install it using the following command: yum install iotop. Procedure Examine the list of open files.
Run the lsof command to get the list of open files. If lsof is not available, run the ps ax command. On the command line, execute the kill command. In the System Monitor , right-click the line with the program process name, and click End or Kill from the context menu.
Additional resources The kill man page. Procedure Select the folder or file you want to bookmark. Customizing default favorite applications. Setting different favorite applications for individual users. Procedure Open the Activities overview by clicking Activities at the top left of the screen. Add applications into your favorite list using any of the following methods: Click the grid button to find the application you want, right-click the application icon, and select Add to Favorites.
Click-and-drag the icon into the dash. Setting the same favorite applications for all users. Logout and login again for system-wide changes to take effect. Authenticating the user in the desktop environment. Procedure While logging in, enter the domain user name followed by an sign, and then your domain name. Procedure At the login welcome screen, choose Use Enterprise Login. Enter your domain name into the Domain field. Enter your domain account user name and password.
Click Next. For more information, see Section Procedure Open the Settings window clicking icons in the top right corner of the screen. Fill out the Domain , Username , and Password fields for your enterprise account. Click Add.
Additional resources The realm man page. Prerequisites Install the dconf-editor package: yum install dconf-editor.
Turn on the enable-password-authentication option. Turn on the enable-smartcard-authentication option. Additional resources The dconf-editor man page. The dconf man page. Configuring smart card authentication in GDM using the command line.
Additional resources The dconf man page. Enabling the smart card authentication method in the system. Additional resources For details about configuring system to allow smart card authentication and the system-config-authentication tool, see Configuring smart cards using authselect. Additional resources For more information about fingerprint authentication and the system-config-authentication tool, see the Configuring user authentication using authselect. Printing File saving on disk Repartitioning User logout and user switching.
Save the changes. Locking down user logout and user switching. Restricting the session to a single application. For example, to launch the Firefox browser in single-application mode, enter the following content:! Procedure To restart the GDM service, run the following command: systemctl restart gdm. Adding an autostart application for all users. Procedure Create a. Use the full file path. Replace org. Additional resources You can also configure an autostart application for a specific user.
Use the Tweaks application, which is available from the gnome-tweaks package. Users can potentially lose unsaved data if an idle session is automatically ended. Procedure Run the gsettings range command on the required key. Setting screen brightness and idle time. Configure the drop in the brightness level Set brightness level Set idle time. Locking the screen when the user is idle. The red circle in the top-right corner of the screen disappears. Configuring the screen rotation for a single user.
Configure the rotation using the Orientation field. Confirm your choice by clicking Apply. If you are satisfied with the new setup preview, click on Keep changes.
Additional resources For information on rotating the screen for all users on a system, see Configuring the screen rotation for all users. Configuring the screen rotation for all users. Procedure Prepare the preferable setup for a single user as in Configuring the screen rotation for a single user.
Additional resources Configuring the screen rotation for a single user. Configuring the desktop environment for accessibility. Components that provide accessibility features. Speech synthesizer Provides a speech output.
Braille display Provides a tactile output. Additional resources Orca help page. Prerequisites Ensure that brltty and speech synthesis for brltty are installed: yum install brltty brltty-espeak-ng.
Procedure Enable the brltty service to start on boot: systemctl enable --now brltty. Verification steps Reboot the system. Authorizing users of a Braille display device. Authorizing users of a Braille display device with brltty. Specify the users. Authorizing users of a Braille display device with brlapi. Prerequisites Your system must use a file system where users or groups can be assigned to a file.
Setting the driver for a Braille display device. Procedure Decide whether you want to use the autodetection for finding the appropriate driver for your Braille display device.
To use autodetection, use the default option as follows: braille-driver auto autodetect Warning. Configuring a Braille display device. Supported types of Braille display device. USB device [serial-number] The brackets [] here indicate optionality. Bluetooth device bluetooth:address.
Example Settings for particular Braille display devices First serial device braille-device serial:ttyS0 First USB device matching braille driver braille-device usb: Specific USB device by serial number braille-device usb:nnnnn Specific Bluetooth device by address braille-device bluetooth:xx:xx:xx:xx:xx:xx.
The virtual serial device can look like this: serial:ttyUSB0 You can find the actual device name in the kernel messages on the device plug with the following command: dmesg fgrep ttyUSB0. Setting specific parameters for Braille display devices. Procedure Decide whether you want to use the autoselection for finding the appropriate text table. For example, to use the contraction table for American English, grade 2: contraction-table en-us-g2 English US, grade 2.
Procedure Open the Gnome Settings menu. Select Universal Access. Verification steps Check that the Universal Access Menu icon is displayed on the top bar even when all options from this menu are switched off. The Wacom Tablet settings panel for a grip pen. You can try to find the definition file there.
If you find your tablet model in the list, copy the file to the local machine. These features describe those available on the tablet. Prerequisites The definition file for the tablet that you want to add exists. Procedure Add and install the definition file with the.
Where is the Wacom tablet configuration stored. Listing available Wacom tablet configuration paths. Prerequisites Make sure that the gnome-settings-daemon package is installed on your system. Installing applications using Flatpak.
Procedure Install the flatpak package: yum install flatpak. By default, Podman saves the credentials only until you log out. Prerequisites Flatpak is installed.
The Red Hat Flatpak repository is enabled. LibreOffice stable rhel The LibreOffice productivity suite. The Red Hat Flatpak remote is enabled. The selected Flatpak application is installed. A Flatpak remote is enabled. Installing Flatpak applications in the graphical interface. Procedure Open the Software application. Make sure that the Explore tab is active. Click the search button in the top-left corner of the window.
In the input box, type the name of the application that you want to install, such as LibreOffice. Select the correct application in the search results. Click the Install button. If Software asks you to log in, enter your Customer Portal credentials or your registry service account tokens. Wait for the installation process to complete. Let's verify this by entering the command:. However, to start it, you must enter the command startx every time you start the operating system, which is not very convenient.
Let's make it start automatically. To do this, use the following command:. First, we update the system. This is not always required, but doing so is good practice: yum update. We are waiting for the installation of updates to complete and move on to the next step. Let's verify this by entering the command: startx. To do this, use the following command: systemctl set-default graphical.
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