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Hi guys I tried to add new directory to the PATH, but instead appending I overwrote it. Is there any way to restore those default paths?
If you changed your PATH in a Terminal shell, simply close that Terminal window and open a new one. Changes to environment variables are local to the shell in which you change them (and any subshells created by that one).
Just restart your terminal that will assign variables based on your .profile or .bashrc ( if you are running bash )
来源：https://stackoverflow.com/questions/5609648/restore-path-under-mac-os-x