Commands
Useful tools / programs / options
import [ -window root ] filename.ext- macht einen Screen-Shotstartx /etc/X11/Sessions/kde-3.3.2 – :1- zweiten X-Server (auf '[CTRL-]ALT-F8') startenwatch- execute a program periodically, showing output fullscreenscript <file>- zeichnet eine Terminal-Session aufunison- syncronize directories (even on remote computers)mendeley- document and reference management system
Misc
Add manually installed version to update-alternatives
$ # update-alternatives --install <gen-name for (master) link> <symlink name in /etc/alt...> <program binary to be added> <priority (unused?)> $ sudo update-alternatives --install /usr/bin/x-www-browser x-www-browser /home/sfoo/firefox3.5/firefox 1 $ sudo update-alternatives --set x-www-browser /home/sfoo/firefox3.5/firefox Using '/home/sfoo/firefox3.5/firefox' to provide 'x-www-browser'.
Convert scanned pdfs to low file size a4 pages
convert in.pdf -modulate 150,90 -scale 80% -page 842x595 -compress JPEG2000 -quality 85 -type optimize out.pdf
-modulate 150,90: set brightness to 150% of original, saturation to 90%-scale 80%: reduce number of pixels → smaller file size-page 842×595: (with DPI=72) 29.7×20.9cm ,i.e. a4 landscape (595×842: a4 portrait; 612×792: letter portrait, …)
Test USB Drive
sudo badblocks -vsw -t random $DEVICE
Make bootable USB Drive
wget "http://archive.ubuntu.com/ubuntu/dists/hardy/main/installer-i386/current/images/hd-media/boot.img.gz" zcat boot.img.gz /dev/sda1 parted /dev/sda # resize file system to full size mount /dev/sda1 /media/usb cp ubuntu-8.04.iso /media/usb install-mbr /dev/sda #if necessary
Disable console beep
* To remove all console beeps whilst running X you should execute:
xset b off
This disables the console beep for all programs.
* To remove all console beeps whilst running from the system console execute:
setterm -blength 0
This disables the console beep for all programs, by setting the “beep length” to zero.