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    @Sony: Note that you should use return to escape from a script sourced in this way, not exit - they are like shell functions, and exit will exit the shell that sourced the script. Commented Dec 19, 2011 at 8:19
  • @CharlesStewart In fact, I'm not familiar with sourced scripts. Thank you! Commented Dec 19, 2011 at 12:56
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    is source ./script the same? Commented Dec 19, 2011 at 13:04
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    @amyassin: yes, it is Commented Dec 19, 2011 at 13:05
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    1. . and source are equal in bash. 2. we don't need to use ./ before filename if it's in the same directory. It is ok to run only this: . script Commented Jun 16, 2016 at 15:02