Some useful Linux commands

Zipping the contents

tar -cvzf Destination folder Source folder from where files need to copy

Extracting the contents

tar -xvzf Source folder to extract

Zip the contents excluding the folders

tar -cvzf Destination folder Source folder from where files need to copy
--exclude="contents" --exclude="tmp"

To delete all occurance of files start with some extension

Eg:

find . -name ".svn" -exec rm -rf {} \;