1. XWN740 X-Windows Configuring and Using X Utility Programs
(Chapter 6: Pages )‏

2. Agenda X Utility Programs: Displaying X Server / Window information
Control System Bell / Keyboard / LEDs
Kill a X Windows client
Color code Magnifier

3. X Windows Utilities
The standard X distribution contains a number of command-line utilities to configure and administer the X Windows server.
These tools have been collected over many years, and some have a very old look and feel to them.
Nonetheless, some of these tools continue to be very useful for system administrators.

4. X Windows Utilities
The utilities available from X.org relating to this chapter include:
xdpyinfo
an X client that gathers information about the display and outputs it to standard output. This very simple program is invaluable when debugging an X server setup.
xwininfo
for obtaining basic information about a window, including its size, location, visibility, color depth, ID, and name. We have used this in a previous lesson.

5. X Windows Utilities
The utilities available from X.org relating to this chapter include:
xset
is a utility to view and change certain settings that X Windows sever allows you to change “on-the-fly”.
xkill
enables you to kill an X client by clicking on it. Actually, it doesn't kill the client process, but it does kill the connection between the X server and the client. In most cases, that's enough to cause the client to terminate; in any case, it gets it off the screen.

6. X Windows Utilities
The utilities available from X.org relating to this chapter include:
Examples Involving xset Utility: (Refer to sections 6.5 to 6.8 in X Power Tools text)
Control System Bell Characteristics
Turn on/off System Bell
Set Keyboard repeat
Set Keyboard repeat for specific key
Set Keyboard repeat rate and delay
Control Keyboard LEDs
Prevent Screen from Blanking During Presentations

7. X Windows Utilities
The utilities available from X.org relating to this chapter include:
xmag
a simple utility that magnifies part of the display and displays the color code of selected pixels. Start it without any arguments.
xwd > filename
takes a snapshot of the current screen, a manually selected window or a window designated by its numeric ID, and outputs the image to standard output or to a file. The utility xwdis can be used in a shell script..

8. X Windows Utilities
The utilities available from X.org relating to this chapter include:
xscreensaver
a simple utility to configure and run a screensaver to enhance security.
xrefresh
Once in a while, a bug in a client program (or, in rare cases, a buggy video card driver) will cause it to leave artifacts in its windows—dots, lines, or partial images that shouldn't be there. The xrefresh utility cleans up the screen image which causes every client to redraw itself

9. X Windows Utilities
There are some other useful utilities for the system administrator that may be covered in future lessons:
xev - testing input events
xkbsetmap, xmodmap - setting the keymap
xlsfonts , xfontsel , mkfontdir , mkfontscale: For dealing with old-style fonts
x11perf, x11perfcomp, xmark - benchmarking X
xsm - session management
glxinfo, xtrapinfo, and xvinfo – Extension information