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`up 3` will climb the directory tree by three steps. `up asdf` will do nothing, and returns exit code 1 as an error should.
There are 6 alternatives - vote for the best!
I wrote this a long time ago, wondering why this wasn't floating around somewhere out there (at least not where I could find).. this seems much more simple than multiple aliases and can cd out of directories easier.
Change n directories up, without parameters change one up
If you can do better, submit your command here.
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