pdftk, is a useful command line utility that allow to manipulate your pdf files. You can install it through your favorite package manager (example under Fedora)
natjohan# yum install pdftk
The syntax of pdftk is very simple :
pdftk <input_files_seperate_by_spaces ...`Sed`, Stream Editor is a Unix utility that parses and transforms text.
Here is a simple and useful example : replace the character string 'priority 300' by 'bandwidth priority percent 10' in all .txt files in our current directory
find ...
Powertop is a little utilitie that allow you to reduce your computer power consumption. This is an interesting soft for laptop owner, to install it, simply use you favorite package manager
natjohan# yum install powertop
Now, just launch powertop command with root privileges, the ...