Find and Replace many files
find /home/user/directory -name \*.c -exec sed -i "s/cybernetnews/cybernet/g" {} \;
http://askubuntu.com/questions/84007/find-and-replace-text-within-multiple-files
find /home/user/directory -name \*.c -exec sed -i "s/cybernetnews/cybernet/g" {} \;
http://askubuntu.com/questions/84007/find-and-replace-text-within-multiple-files