GNU – touch

This simple command is able to do a few things. If you read the man description it will tell you this:

touch - change file timestamps

so basically this tool changes the timestamp of a file, but it can also do:

A FILE argument that does not exist is created empty, unless -c or -h is supplied

which is what people usually use this command for. So the next time you need to create an empty file, in a fast and simple way, just type:

touch filename

and a new empty file named filename will be created for you. As allways check the man page for more information