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How do I rename all files in a directory, recursively, changing one file extension to another, for thousands of files in thousands of subfolders? I see a lot of commands that do almost what I want, but not quite.

find . -name "*.andnav" -exec rename .andnav .tile {} \;
syntax error at (eval 1) line 1, near "."

...

rename -nv 's/\.andnav$/\.tile/i' *.andnav
0.png.andnav renamed as 0.png.tile
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1  
Do you have Debian rename or Red Hat rename? – Ignacio Vazquez-Abrams Nov 20 '10 at 16:42
    
@Ignacio: Ubuntu = Debian? – endolith Nov 20 '10 at 16:44
    
Yes, Ubuntu is a Debian derivative. – Ignacio Vazquez-Abrams Nov 20 '10 at 20:39
up vote 16 down vote accepted

Figured it out

find . -name "*.andnav" -exec rename -v 's/\.andnav$/\.tile/i' {} \;
./0/0.png.andnav renamed as ./0/0.png.tile
./0/1.png.andnav renamed as ./0/1.png.tile
./1/0.png.andnav renamed as ./1/0.png.tile
./1/1.png.andnav renamed as ./1/1.png.tile

of course remove the -v when actually doing it, or it will waste time displaying all the files

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Something like:

find . -name '*.andnav' -exec sh -c 'mv "$0" "${0%.andnav}.tile"' {} \;
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this one worked best for me – cwd Jul 17 '11 at 21:04

With zsh:

autoload zmv
zmv -n '(**/)(*).andnav' '$1$2.tile'

Remove the -n to actually perform the renaming.

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Fantastic answer! – Chris Knadler Apr 17 '13 at 17:33

I found this method is easier and easier to read:

find . -name "*.andnav" | rename "s/\.andnav$/.tile/"

At least on Ubuntu derivations rename takes a list of files from STDIN if none are on the command line. And this can be tested easily with:

find . -name "*.andnav" | rename -vn "s/\.andnav$/.tile/"

until you get it right.

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