batch renaming folders

goltoof · 11-12-2013, 09:31 AM

I got a directory of folders named "No 35" No 36" "No 128" etc. I just want to take out the "No" part so they're just named the number. I'd alos like to add something before the number line "unit_" so the folder are named "unit_35" unit_36" etc..

druuna · 11-12-2013, 09:56 AM

Have a look at this:

Code:

while read THISDIR; do mv "$THISDIR" "${THISDIR/No /unit_}"; done < <( ls -bd No* )

You do need to be careful because your directory names contain spaces: Correct quoting and a modified ls are needed.

This: ls -bd No* makes sure that only files that start with No are listed (the -d prevents ls from going any deeper). The -b part escapes special characters (the spaces in your case).

Example run:

Code:

$ ls -l
drwxr-x--- 3 druuna druuna  4096 nov 12 16:54 No 1
drwxr-x--- 2 druuna druuna  4096 nov 12 16:53 No 10
drwxr-x--- 2 druuna druuna  4096 nov 12 16:53 No 110

$ while read THISDIR; do mv "$THISDIR" "${THISDIR/No /unit_}"; done < <( ls -bd No* )
$ ls -l
drwxr-x--- 3 druuna druuna 4096 nov 12 16:54 unit_1
drwxr-x--- 2 druuna druuna 4096 nov 12 16:53 unit_10
drwxr-x--- 2 druuna druuna 4096 nov 12 16:53 unit_110

suicidaleggroll · 11-12-2013, 09:58 AM

You could simplify things a bit

Code:

for i in No*; do mv "$i" "${i/No /unit_}"; done

No need for special escaping or while/reads when you incorporate the globbing directly into the for loop.

Firerat · 11-12-2013, 10:04 AM

Just in case you have files that start No

Code:

for i in No*/; do mv "$i" "${i/No /unit_}"; done

/ so you only get directories

druuna · 11-12-2013, 10:05 AM

@suicidaleggroll: Old habits die hard.... For whatever reason I always overlook globbing directly into the for loop.

@goltoof: Both methods work, but I would use suicidaleggroll's method if I where you (simpler/more elegant).

Inkit · 11-13-2013, 12:54 AM

I'm not really good with the command line and use the bulk rename application to do this. It's an xfce application and gives you a before (file name as is) and after (file name after hitting apply) option which makes it easy for even the most simple minded to use. If you are on Gnome, it may pull in a lot of dependencies, but it's worth it, in my view.