Say you would like to add the .png extension to all files. rename ‘s/$/.png/’ * Source: http://askubuntu.com/questions/74011/how-to-add-an-extension-to-all-files-via-terminal Now recursively add file extension to all files! For example, you have a few directories and sub-directories containing files with no file extension. And you want to add .jpg to all the files contained within these directories. This […]

To list all the files with the .png extension in the dir ls | grep ‘\.prj$’ | wc -l Parsing the output of ls is unreliable because ls mangles unprintable characters. Here is a fully reliable way of counting the files matching a certain extension. This shell snippet creates an array containing the file names, […]