If we want to create our own library of functions, then we can create a script and add all the functions into this script. We can make all the functions from our script functions.sh available in the current shell by calling source or the period . command.
The procedure to load all functions into the current shell is as follows:
$ country USA
Since the country function is not a part of the shell environment, this command will give an error:
$ . functions.sh
Or it could display this one:
$ source functions.sh
$ country USA India Japan
This will execute the country function along with the parameter, USA India Japan.
We can even load a script containing library functions inside another script as follows: ...
