You can have multiple commands in one line as long as they are separated with the
Note that this is not a very widely used feature – but it is seen.
Make A Subdirectory, Make A File, View Directory Contents
mkdir example_directory; touch example_file.txt; ls -l
total 4 drwxrwxr-x 2 chris chris 4096 Jul 25 16:31 example_directory -rw-rw-r-- 1 chris chris 0 Jul 25 16:31 example_file.txt