#! shebang or shebang line is used to tell the operating system which interpreter to use to parse the rest of the file.
Lets create your first hello world script.
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#!/bin/bash
echo "Hello World"
Set file permission to execute.
-
+allows execution. -
-disallows execution. -
xmeans execute permission.
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chmod +x my_script.sh
This is how you can run it.
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# option 1
./my_script.sh
# option 2
bash my_script.sh
# option 3
/bin/bash my_script.sh