su is run a shell with substitute user and group IDs. su is used to become another user during a login session. Invoked without a username, su defaults to becoming the super user. The optional argument – may be used to provide an environment similar to what the user would expect had the user logged in directly.
Howto Replace multiple file text string in Linux
If you have a folder with a lot of files in a directory and with a specific string that you want to change you can do it in seconds using grep and perl command line
Rename multiple files to another extension in Linux
Let us say that you want to rename all of your “.php5″ files to “.php” files. You can use for loop.
Envy – ATI and NVIDIA drivers installation made easy
“Envy” is an application for Ubuntu Linux and Debian written in Python and PyGTK.
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