> - It may be useful to copy `$PWD` into a variable before changing directory $OLDPWD is set when you 'cd'. Also 'cd -' will take you back to the last director

> - It may be useful to copy `$PWD` into a variable before changing directory $OLDPWD is set when you 'cd'. Also 'cd -' will take you back to the last directory. https://pubs.opengroup.org/onlinepubs/9699919799/ https://pubs.opengroup.org/onlinepubs/9699919799/