# enable bin diretory in PATH when found
if [ -a ~/bin ]; then
    PATH=$PATH:~/bin
fi

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Put this line in your .bashrc. 
If the user has a directory named 'bin' then that will be added to the PATH.
All scripts in that path (wich are executable) will be available as commands to that user.

If a 'bin' exists in the user home, then add that to the PATH.

Bash, linux

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