cd to (or operate on) a file across parallel directories

cd ${PWD/a/b}
This is useful for quickly jumping around branches in a file system, or operating on a parellel file. This is tested in bash. cd to (substitute in PWD, a for b) where PWD is the bash environmental variable for the "working directory"
Sample Output
[root@centos manifests]# pwd
[root@centos manifests]# cd ${PWD/nfs/packages}
[root@centos manifests]# pwd

.. or operate on a file in parallel directory
[root@centos manifests]# vi ${PWD/packages/nfs}/init.pp
[root@centos manifests]# cp -a ${PWD/packages/nfs}/init.pp .

By: greggster
2011-03-03 06:27:12

What Others Think

Thanks for posting this command. I'm sorry, but I can't understand what it does. Could you share some use cases?
wpiekutowski · 596 weeks and 5 days ago
I updated the comment for this. in bash - PWD is the working directory. To test - mkdir -p /tmp/a/b/cow/d mkdir -p /tmp/a/b/fish/d cd /tmp/a/b/cow/d; pwd where are you? cd ${PWD/cow/fish}; pwd where are you now?
greggster · 596 weeks and 4 days ago
Thanks! I didn't know about the ${PWD/cow/fish} substitution.
wpiekutowski · 596 weeks and 2 days ago
Thanks. One of the things I missed way back in the day when I switched from ksh to bash was the ksh "cd a b" which basically does what you show here. I wrote a function so bash does the same thing but this is handy.
splante · 592 weeks and 2 days ago
Auto Glass Repair of Santa Ana appreciates this code because this is what they really need for the directories!
TylerCorona · 49 weeks and 5 days ago
Excellent Blog! I would like to thank for the efforts you have made in writing this post. I am hoping the same best work from you in the future as well. Tutuapp
wick09788 · 42 weeks and 3 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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