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The environmental variable in $PWD has the current working directory. Is there a variable that contains the previous directory? If there is not, how might one be created?

I think this could be useful.

28

Yes, there is. man bash will lead you to

   OLDPWD The previous working directory as set by the cd command.
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    Nice, I didn't know about this. – kos Sep 13 '15 at 2:50
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    This is going to be so useful. (uncd command, anyone?) – Kaz Wolfe Sep 13 '15 at 6:26
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    You can use cd - to go back to the previous directory. – NZD Sep 13 '15 at 6:43
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    Bash maintains a stack of all directories you have visited. You can use pushd and popd to manipulate this stack. See man bash for details. – NZD Sep 13 '15 at 6:46
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    @NZD unless I've somehow been very confused for a long time, the stack does not contain all directories you've visited - only those you've specifically stored using pushd. – David Z Sep 13 '15 at 16:38

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