Birmingham mumbai

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Save the file and exit the editor. In order to run this file as a script, we need to mark it 
as executable:
chmod +x ~/myscript.sh
To execute it, we simply call the path to the file and the filename:
~/myscript.sh
The output should look similar to the following:
My name is jay
My home directory is /home/jay
My default text editor is vim
The first line, 
#!/bin/bash
, might seem strange if you haven't seen it before. 
Normally, lines starting with a hash symbol (
#
) are ignored by the interpreter. The 
one on the first line is an exception to this. The 
#!/bin/bash
 entry we see on the first 
line is known as a