Bash Cookbook

How to do it...

1. Open a terminal, and create the whoami.sh script:

#!/bin/bashVAR=$0echo "I was ran as: $VAR"

2. Execute whoami.sh and observe what has happened:

$ bash whoami.sh

3. Next, create a soft link to whoami.sh using the ln command:

$ ln -s whoami.sh ghosts-there-be.sh

4. Next, run ls -la. Notice any differences?

ls -la ghosts-there-be.sh whoami.sh 

5. On to hard links, which are created this way using ln:

$ ln ghosts-there-be.sh gentle-ghosts-there-be.sh$ ln whoami.sh real-ghosts-there-be.sh

6. Next, let's look at the difference in results when running the commands:

$ ls -la ghosts-there-be.sh whoami.sh real-ghosts-there-be.sh gentle-ghosts-there-be.sh lrwxrwxrwx 1 rbrash rbrash 18 Dec 12 15:07 gentle-ghosts-there-be.sh -> ghosts-there-be.sh ...