Linux was created to be much like UNIX, so it only makes sense that you should be able to create a UNIX timestamp on Linux. 

From the command line you can do this for whatever your purpose is.

Creating a UNIX timestamp from the command line is easy and all you have to do is run the following command from a command prompt:

date +%s

 That's all you need to do. Running that command will show you the current UNIX timestamp.