Number of pages inside a pdf

$ grep -o "'Page[0-9]*'" your.pdf | tail -1 | grep -o "[0-9]*"

wildcard && brace expansion -eq <3

mplayer *s05e0{1,2,3}*

Queues the following files:
xyz.s05e01.someformat
abc.s05e02.someotherformat
123.s05e03.format
...

Check http://www.gnu.org/software/bash/manual/html_node/Brace-Expansion.html

undefined symbol: apr_reslist_maintain after upgrading httpd on Slackware 13.37

After upgrading apache to the latest patch (ftp://ftp.slackware.com/pub/slackware/slackware-13.37/patches/packages/) you get that error: "/usr/sbin/httpd: symbol lookup error: /usr/sbin/httpd: undefined symbol: apr_reslist_maintain" when starting httpd / apache.

In order to resolve it you have to update apr (Apache Portable Runtime, makes sense, huh? ;)) and apr-util to the latest patched versions (get them here ftp://ftp.slackware.com/pub/slackware/slackware-13.37/patches/packages/).

"QGtkStyle was unable to detect the current GTK+ theme." [SOLVED]

Finally found the solution:

gconftool-2 --set --type string /desktop/gnome/interface/gtk_theme your-theme-name

Source: https://bbs.archlinux.org/viewtopic.php?pid=1067521
Source: http://forums.opensuse.org/english/get-technical-help-here/network-internet/455664-errors.html

Show single image with xlock

Took me a while to figure out how to simply show an image when locking with xlock:

$ xlock -mode image -bitmap image.xpm -count 1

-mode image: sets the mode to only display random sun images
-bitmap image.xpm: replace the random sun images with image.xpm (*)
-count 1: sets the amount of images that shall be shown at the screen at once to 1

* use ImageMagicks 'convert' method to convert to xpm: $ convert input.jpg output.xpm

Have fun!

x121e Cardreader (rtl_pstor) - Kernel 3.4.4 menuconfig

Took me a while to figure out where the driver for my cardreader resides. In menuconfig go this path:

Device Drivers -> Staging drivers

and check this one, either as module or builtin:

RealTek PCI-E Card Reader support

No longer Skype beta on Linux - Skype 4.0!

Skype 4.0 has been released.
Of course, there's no Slackware-Package available from the Skype homepage. (Who knew? ;))

If you want to upgrade to Skype 4.0 today, you can use this Source-Package:
http://download.skype.com/linux/skype-4.0.0.7.tar.bz2

and build it by using this SlackBuild:
https://github.com/willysr/SlackHacks/tree/master/SlackBuild

The SlackBuild script linked above has also been submitted to slackbuilds.org, but currently it's in the pending queue (and I've seen script in the pending queue for about two months, so don't count on that :)).

NOTE: If you're on a 64 bit Slackware you need to add 32 bit librarys. See this page for further information: http://www.linuxquestions.org/questions/slackware-14/skype-4-0-on-slackware-13-37-64bit-4175411533/

Have fun... well, you have fun, I mean, you're using Slackware. :)

Edit: Ahh, finally there's a fresh, warm, approved Slackbuild available.

xfce4-screenshooter 1.7.9 - Segmentation Fault on startup

When starting xfce4-screenshooter, there's an segmentation fault message and it (of course) doesn't start up. The solution is pretty simple:

touch ~/.config/xfce4/xfce4-screenshooter

Source: http://www.linuxquestions.org/questions/slackware-14/where-to-get-xfce4-8-goodies-etc-885538/#post4382696

wicd-gtk / wicd-client (tray) not starting, glib.GError: Unable to connect to server

Start wicd-client with '-n' - disable notifications and everything is fine. See source below if you want to use notifiations:

Source: https://bbs.archlinux.org/viewtopic.php?id=108666

Headphonejack not working on x121 w. Slackware 13.37 - Kernel 2.6.37-6

Use alsaconf to create config file. Edit the created config file /etc/modprobe.d/sound.conf , add the following line:


options snd-hda-intel model=thinkpad

Save and either reload modules or reboot.

Keycodes & X

Cool tutorial on keycodes and how they are noticed by the kernel (& passed to X). http://fail2fail.com/archives/2-Hardware-Tasten-unter-Linux-unabhaengig-von-Desktop-Umgebung-nutzen.html

pm-tools - dig deeper

Nice howto, even if it's for gentoo:

http://www.gentoo.de/doc/de/power-management-guide.xml

Enable cups

chmod +x /etc/rc.d/rc.cups
/etc/rc.d/rc.cups start

Source: alien slackbook 

Slackware local shutdown script (to wipe out /tmp etc.)

Doesn't exist, but according to rc.local it's ok to create & use it :)

/etc/rc.d/rc.local_shutdown

Chrome 15 from Slackbuild.org

Install libevent:
http://slackbuilds.org/repository/13.37/libraries/libevent/

then chromium:
http://slackbuilds.org/repository/13.37/network/chromium/

Customize XFCE4 Menu

http://wiki.xfce.org/howto/customize-menu

Desktop files are located here: /usr/local/share/applications | /usr/share/applications/

List only symbolic links in current directory

find . -type l -exec ls -la {} \;

Got to say that here: find with -exec param is sooooo mighty!

Copy files recursively without keeping directory structure (Linux)

We had to copy many files that were located in a very complex directory structure. The following snippet searches the current directory and its subdirectories for *.xml files & executes the cp command on every file it finds (the braces {} represent the file):

find -type f -iname '*.xml' -exec cp {} /target/dir/for/all/xmls/ \;

The target dir now contains all *.xml files without directories.

Change keyboard layout in Slackware 13.37

/usr/share/X11/xorg.conf.d/90-keyboard-layout.conf