04-20-2013
I suspect he is referring to $PWD which is the basis for your paths. So all your paths will be relative to $PWD, which is the path the caller of the script happens to be in when he calls the script. So indeed that location would be determined outside the script.
So you would either need to use a cd-command before that statement or use an absolute path instead. Or, if you need to use paths relative to the location of your script, you could perhaps use information from $0 as the basis...
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