09-07-2015
To make scripts executable, you need to set its directory entry's "executable permissions" for the intended users/persons, "owner", "group", or "others". Enter chmod (all lower case) into the shell for this. Consider well which target users should receive that permission; in above sample you give it to all three groups.
nano is one among other editors used to modify scripts. It has nothing to do with the execution of a script.
The so called "shebang" within the script text is not mandatory but helps the shell decide which program to use to run the script.
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