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this command gives you the total number of memory usuage and open files by the perticuler PID.
This will lower the quality of mp3 files, but is necessary to play them on some mobile devices.
":! ls -l " results in listing the files in the current directory. pressing "enter" will get you back into vi.
Good for automating reports that need to run from between two dates.
Used this after cloning a disk with dd to make the newly written partitions show up in /dev/
Google just released a new commend line tool offering all sorts of new services from the commend line. One of them is uploading a youtube video but there are plenty more google services to interact with.
Download it here: http://code.google.com/p/googlecl/
Manual: http://code.google.com/p/googlecl/wiki/Manual
This specific command courtesy of lifehacker:http://lifehacker.com/5568817/
Though all can be found in manual page linked above.
First of all you need to run this command.
X :12.0 vt12 2>&1 >/dev/null &
This command will open a X session on 12th console. And it will show you blank screen. Now press Alt + Ctrl + F7. You will get your original screen.
Now run given command "xterm -display :12.0 -e ssh -X user@remotesystem &". After this press Alt + Ctrl + F12. You will get a screen which will ask you for password for remote linux system. And after it you are done. You can open any window based application of remote system on your desktop.
Press Alt + Ctrl + F7 for getting original screen.
Using gentoo prefix portage I got in a situation where some packages did not contain the needed RPATH variable. This command helped me to find out which ones I should recompile
Use color escape sequences and sed to colorize the output of svn stat -u.
Colors: http://www.faqs.org/docs/abs/HTML/colorizing.html
svn stat characters: http://svnbook.red-bean.com/en/1.4/svn-book.html#svn.ref.svn.c.status
GNU Extensions for Escapes in Regular Expressions: http://www.gnu.org/software/sed/manual/html_node/Escapes.html