Ubuntu 16.04访客会话默认用Gnome Metacity的配置文件位置查询

Hey there! I’ve helped with similar configuration tweaks on Ubuntu 16.04 before, so let’s walk through how to make Metacity the default window manager for guest sessions:

Key Configuration File Locations #

First, let’s cover the critical files you’ll need to modify—these are tied to LightDM (Ubuntu 16.04’s default display manager) and X session startup:

• LightDM Guest Session Wrapper: /usr/share/lightdm/lightdm.conf.d/50-guest-wrapper.conf
  This file controls how the guest session is initialized. We’ll add an environment variable here to override the default window manager.

• X Session Startup Scripts Directory: /etc/X11/Xsession.d/
  Scripts in this folder run automatically when any X session starts (including guest sessions). We can create a custom script here to force Metacity to launch.

Method 1: Modify the LightDM Guest Configuration #

This is the most straightforward approach:

1. Open the guest wrapper config file with sudo privileges:

   sudo nano /usr/share/lightdm/lightdm.conf.d/50-guest-wrapper.conf
   

2. Add the following line to the file (it sets the window manager environment variable):

   env/WM=metacity
   

3. Save your changes (press Ctrl+O, hit Enter, then Ctrl+X to exit nano).

Method 2: Create a Custom X Session Script #

If Method 1 doesn’t work for your setup, use this fallback approach:

1. Create a new script file in the Xsession directory (we’ll name it 99-guest-metacity to ensure it runs last):

   sudo nano /etc/X11/Xsession.d/99-guest-metacity
   

2. Paste the following content into the script—it checks if the user is the guest and forces Metacity to start:

   # Force Metacity as window manager for guest sessions
   if [ "$USER" = "guest" ]; then
       export WM=metacity
       exec metacity &
   fi
   

3. Make the script executable:

   sudo chmod +x /etc/X11/Xsession.d/99-guest-metacity
   

Apply and Test the Changes #

Restart LightDM to activate your new configuration:

sudo service lightdm restart

Now, when a guest user logs in, Metacity should replace the default Ubuntu window manager (Unity’s Compiz) as the active window manager.

Quick troubleshooting tip: If you run into issues, check the LightDM logs at /var/log/lightdm/ for errors related to guest session initialization or window manager startup.

内容的提问来源于stack exchange，提问作者Philippe Gaucher