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The #! line has two programs that "interpret" it:
  • To the shell. An executable file that starts with a #! line will cause the executing shell to start up the program indicated in that line. That way, you can use #!/bin/sh to create a shell script, #!/usr/bin/perl to create a perl script etc. At least on unixish systems, there is always a shell involved in this process (but for instance windows doesn't work like that)

  • (Possibly) to the interpreter indicated in the #! line.

    For instance, perl reads the additional arguments on the #! line as a sort of "setup parameters". Example: #!/usr/bin/perl -wT will run perl with global warnings enabled and in taint mode.

In reply to Re^2: The basics by Joost
in thread The basics by root

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