Bash scripting
From Camilo's web
How to create the script file
To create a bash script accessible globally throughout the terminal, you need to put it in a root folder accessible to the whole system. A good place to put it is
/usr/local/bin
There you can create (using your root role) the script file my_script, which should look like this:
#!/bin/bash script line 1 script line 2 ...
and once the coding is done, you need to make it executable
sudo chmod +x my_script
Examples
Alias to open a pdf file with TexShop
The script is called ts and it contains the following lines:
#!/bin/bash open -a TexShop "$1"
Here the ''$1'' means that the script requires a parameter, which is this case is the file that you want to open.