Linux CD Mastering - Customizing LinuxCustomizing Linux
Okay, now we're ready to "customize" our CD. There are lots of things that we could do. We could change the background graphics, we could have our CD automatically launch some program, or we could install some new software. The sky's the limit, you can pretty much do whatever you like. If you're thinking about venturing out on your own here, we recommend reading ahead to the section titled "Environment shutdown" and backing up your VmWare files before getting carried away. That way, you'll always be able to recover back to this point, even if you totally corrupt your mastering environment. For our example, we will do the following:
- Change the background image for X-Windows
- Disable the startup and shutdown sounds permanently
- Prevent Konqueror from loading at startup
First we'll replace the background image with one that we've doctored up. The background image that is presented by default is located at /mnt/work/master/cdrom/KNOPPIX/background.jpg (note: It is possible that the default image may be in another location if you downloaded a different version than we used or something else has been changed). In order to override it, we'll simply create a new background and save it with the same name in the same location. Now that you've been through the hard stuff, we'll stop holding your hand for each and every command. If you'd like to download a pre-made version of this image, you can find it here.
Now, to disable the startup and shutdown sounds, we just need to move or rename the sound files located in /mnt/work/master/KNOPPIX/usr/share/sounds/. The files we're interested in are startup.ogg and shutdown.ogg. We'll move these into a subdirectory so that they can't be played during startup and shutdown.
root@tty1[root]# cd /mnt/work/master/KNOPPIX/usr/share/sounds/ root@tty1[sounds]# ls KDE_Beep_Ahem.wav KDE_Desktop1.wav KDE_Window_Maximize.wav KDE_Beep_Beep.wav KDE_Desktop2.wav KDE_Window_Open.wav KDE_Beep_Bottles.wav KDE_Desktop3.wav KDE_Window_Shade_Down.wav KDE_Beep_ClassicBeep.wav KDE_Desktop4.wav KDE_Window_Shade_Up.wav KDE_Beep_ClockChime.wav KDE_Desktop5.wav KDE_Window_Sticky.wav KDE_Beep_Connect.wav KDE_Desktop6.wav KDE_Window_UnMaximize.wav KDE_Beep_Door.wav KDE_Desktop7.wav KDE_Window_UnSticky.wav KDE_Beep_Honk.wav KDE_Desktop8.wav gaim KDE_Beep_Lightning.wav KDE_Dialog_Appear.wav gnomemeeting KDE_Beep_Pop.wav KDE_Dialog_Disappear.wav k3b_error1.wav KDE_Beep_RimShot.wav KDE_Error.wav k3b_success1.wav KDE_Beep_RingRing.wav KDE_Logout.wav k3b_wait_media1.wav KDE_Beep_ShortBeep.wav KDE_Notify.wav pop.wav KDE_Beep_Yo.wav KDE_Startup.wav shutdown.ogg KDE_Click.wav KDE_Window_Close.wav startup.ogg KDE_Close_Window.wav KDE_Window_DeIconify.wav KDE_Critical_Error.wav KDE_Window_Iconify.wav root@tty1[sounds]# mkdir save root@tty1[sounds]# mv shutdown.ogg save root@tty1[sounds]# mv startup.ogg save Note: If you'd like to disable all sounds by default, move all the files into the save directoryAnd finally, we'll prevent Konqueror from loading at startup. During startup, X-Windows (or the KDE window manager to be more precise) reads a number of files to configure itself. The file that actually causes Konqueror to load is located at /mnt/work/master/KNOPPIX/etc/X11/Xsession.d/45xsession. We'll need to edit this file and comment out the Autostart link. Here is a snip out of this file, the LIQ (Line In Question) is highlighted in red:
if [ -e "$INDEXFILE" ]; then cat >> $HOME/Desktop/KNOPPIX.desktop <<EOF [Desktop Entry] Name=KNOPPIX # Exec=kfmclient openProfile webbrowsing $INDEXFILE Exec=konqueror --geometry 800x650+110+40 file:$INDEXFILE Type=Application Icon=html Terminal=0 EOF ln $HOME/Desktop/KNOPPIX.desktop $HOME/.kde/Autostart/showindex.desktop fiWe'll comment this line by slapping a # (pound) sign in front of it. You can edit this file with vi to comment out the line, or simply run the following commands:
root@tty1[root]# cd /mnt/work/master/KNOPPIX/etc/X11/Xsession.d root@tty1[Xsession.d]# grep Autostart.showindex 45xsession ln $HOME/Desktop/KNOPPIX.desktop $HOME/.kde/Autostart/showindex.desktop We want to comment out this line root@tty1[Xsession.d]# sed -i 's/^\(ln.*Autostart.showindex\)/#\1/' 45xsession root@tty1[Xsession.d]# grep Autostart.showindex 45xsession #ln $HOME/Desktop/KNOPPIX.desktop $HOME/.kde/Autostart/showindex.desktop Notice that a # (pound) sign has appeared before the "ln"Okay, that's it, we're ready to create a new ISO image with our customizations. We build the image exactly as we did before, by running the script "/mnt/work/master/mk.sh". Everything else is "automagic"! Remember that this process can take a while, depending on your machine speed, memory, etc. When the build is completed, flip back over to Windows and test the new ISO image in the exact same way as you did when we tested our first ISO image. Just make sure that you select the new ISO image or you won't see our customizations. If you've followed the steps as outlined, your customized Linux ISO image should load without launching konqueror, no sounds, and the background image should be the one that we selected. Here is what ours looks like:
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