Edit file File name : org.gnome.desktop.lockdown.gschema.xml Content :<?xml version="1.0" encoding="UTF-8"?> <schemalist gettext-domain="gsettings-desktop-schemas"> <schema id="org.gnome.desktop.lockdown" path="/org/gnome/desktop/lockdown/"> <key name="disable-command-line" type="b"> <default>false</default> <summary>Disable command line</summary> <description> Prevent the user from accessing the terminal or specifying a command line to be executed. For example, this would disable access to the panel’s “Run Application” dialog. </description> </key> <key name="disable-save-to-disk" type="b"> <default>false</default> <summary>Disable saving files to disk</summary> <description> Prevent the user from saving files to disk. For example, this would disable access to all applications’ “Save as” dialogs. </description> </key> <key name="disable-printing" type="b"> <default>false</default> <summary>Disable printing</summary> <description> Prevent the user from printing. For example, this would disable access to all applications’ “Print” dialogs. </description> </key> <key name="disable-print-setup" type="b"> <default>false</default> <summary>Disable print setup</summary> <description> Prevent the user from modifying print settings. For example, this would disable access to all applications’ “Print Setup” dialogs. </description> </key> <key name="disable-user-switching" type="b"> <default>false</default> <summary>Disable user switching</summary> <description> Prevent the user from switching to another account while his session is active. </description> </key> <key name="disable-lock-screen" type="b"> <default>false</default> <summary>Disable lock screen</summary> <description> Prevent the user to lock his screen. </description> </key> <key name="disable-application-handlers" type="b"> <default>false</default> <summary>Disable URL and MIME type handlers</summary> <description> Prevent running any URL or MIME type handler applications. </description> </key> <key name="disable-log-out" type="b"> <default>false</default> <summary>Disable log out</summary> <description> Prevent the user from logging out. </description> </key> <key name="user-administration-disabled" type="b"> <default>false</default> <summary>Disable user administration</summary> <description> Stop the user from modifying user accounts. By default, we allow adding and removing users, as well as changing other users settings. </description> </key> <key name="mount-removable-storage-devices-as-read-only" type="b"> <default>false</default> <summary>Mount removable storage devices as read-only</summary> <description> Prevent users from writing or modifying files on removable storage devices (i.e. flash disks, mobile phones, cameras). </description> </key> </schema> </schemalist> Save