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I saw a question recently where a user wanted to ensure that his script is only executed by using source.

My question is: what's the difference between ./test_script.sh and source test_script.sh? I do know that when source is used the script file doesn't need +x permissions. Are there any other differences? And my second question is: in what kinds of situations is each method appropriate?

nagamani
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  • Try having a look at the manpage for the source command, there's a pretty good explanation there. `man source` – Matt Feb 16 '18 at 03:01
  • @Matt My distro doesn't have a man page for `source`. And `help source` is just 5 sentences long and basically just says the FILENAME is executed in the current shell and what the exit status can be. I'd like a more in depth explanation. – nagamani Feb 16 '18 at 03:07

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