If you need to remove a path from the PATH variable before your script runs add this to the beginning of the script:

  PATH=$(echo $PATH | sed -e 's;:\?/home/user/bin;;' -e 's;/home/user/bin:\?;;')

If you need, you can re-add it at the front of the list with:

  PATH=/home/user/bin:$PATH

Or you can re-add it at the end of the list with:

  PATH=$PATH:/home/user/bin

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