Write a script called is_regfile.sh that (1) ensures that at least one argument has been given on the command line; then (2) tests whether the argument is the name of a regular file (not a directory or other type of file).

bash-3.2$ ./is_regfile.sh

You must supply at least one argument

bash-3.2$ ./is_regfile.sh addr

addr is a regular file

bash-3.2$ ./is_regfile.sh ../IFT383

../IFT383 is NOT a regular file

Include a ?rst line that calls the Bourne shell as the interpreter

Add a comment to state the purpose of the script and other comments to make the script easier to read