Linux desktop selection: Which utility lets you switch the default X Window desktop environment (for example, between GNOME and KDE) on certain Linux distributions?

Introduction / Context:
Linux distributions that support multiple desktop environments often include a tool to change a user’s default X session without manually editing startup files. Historically, Red Hat–family systems provided switchdesk to toggle between GNOME, KDE, and other desktops.

Given Data / Assumptions:

• You have multiple desktop packages installed.
• You want to change the default desktop for your X session.
• The distribution includes the switchdesk utility (or a similar tool).

Concept / Approach:

switchdesk updates the user’s desktop preference by writing the appropriate session or Xclients file. While modern distros may use display manager menus (GDM, SDDM, LightDM) at login, switchdesk remains a recognizable legacy tool for exam and certification contexts.

Step-by-Step Solution:

Verification / Alternative check:

After re-login, confirm the new desktop environment loads (desktop shell, panels, settings). Check ~/.Xclients or ~/.dmrc for updated entries on older systems.

Why Other Options Are Wrong:

b, c, d: intrc, xinitre, and Xchange are not standard tools for changing default desktops.

e: Not applicable because switchdesk is an established utility for this purpose on certain distributions.

Common Pitfalls:

Expecting switchdesk on distributions that have deprecated it; forgetting that the display manager’s session chooser overrides defaults; lacking required desktop packages leading to fallback to a basic window manager.

Final Answer:

switchdesk