Although the fact that Totti’s magnificent strike against Sampdoria has been dropped to the 2nd spot for the first time in 16 weeks does enervate me a little, it doesn’t affect in any way my adoration for the best soccer league in the world. Get ready for some big-time surprises and enjoy this YouTube video:
Keep a lookout for more interesting soccer action on my blog. As some really preeminent Champions League matches are coming up later tonight and I’ll be trying to record and upload their highlights.
If you’re using KDE, KSnapshot can do the job for you. If you’re using GNOME, gnome-screenshot can also achieve the task with quite perfection. So why would someone ever need tinkering with command-line utilities to generate screenshots?
The answer is: xwd is useful because not everyone uses KDE or GNOME and those who don’t usually despise installing needless extra applications for something as trivial as capturing a screenshot. xwd comes with the X.org server itself, while almost all distributions by default provide the necessary software needed to convert xwd screenshots into more popular formats. Moreover, KSnapshot and gnome-screenshot have a plethora of dependencies on their relative desktop environments whereas xwd is a small, neat and efficient solution for capturing. Let’s start with the requirements:
The first thing that you need to be sure of is that you have either ImageMagickorNetpbm installed on your system. The quickest (generic) way for checking their existence is to issue man ImageMagick and man netpbm commands in a terminal. If you receive “No manual entry for …” errors for both commands, head over to your distribution’s website and download a package for ImageMagick since it would be relatively easier to find.
If you want to capture the whole screen, you can safely skip this section. However, if you want to target a particular window, some extra information shall be needed. Open a terminal and issue the command:
xwininfo: Please select the window about which you
would like information by clicking the
mouse in that window.
Click on the window for which you’d like to take the screenshot. You’ll be shown lots of details about your choice. Only the first line is important. It would be containing a window id. Something like:
xwininfo: Window id: 0x1a00003 “1. Rammstein – Mutter – Ich will (3:39) – Audacious”
Copy the window id. You’ll be needing it in the next section.
Now comes the real part. If you want to capture the whole screen and have ImageMagick installed, use the following command:
$ xwd -root | convert xwd:- capture.png
A file named ‘capture.png’ shall be created in your current directory. You can change the png extension in the command to generate a variety of other formats (e.g. jpg, gif, tiff).
To capture a particular window, you have to provide the window id that xwininfo provided you. The final command will look something like:
$ xwd -id window id | convert xwd:- capture.png
Someone might start wondering here why didn’t I use import command from the ImageMagick suite. Actually, the problem with import is that it really doesn’t work well with all compositing window managers. For example, Emerald’s decorations are always chopped off whenever I take a screenshot with it.
If you have Netpbm installed, you can use these commands instead: