so you want to make a .sh file (shell script).

first line is always "#!/bin/sh"  (a.k.a hashbang then the script type.)
Then you include the command you would enter into the terminal on the next line.

obviously, it can get a lot more complicated, just like batch files, but that's the first step.

simple example:  run.sh


after you've made your .sh file, you need to make it executable.  the command for that is "chmod +x run.sh", or if you have a GUI, you can right click on it, and on one of the property pages you can select to make it executable.

then to run a shell script, you need to type in "./run.sh".  the dot slash is critical.