mjhjmtu

Using the command line (in Fedora) I'd like to rename all the files in the current directory, that have "foo" for the extension, to the same name but with foo1 for the extension.

I've tried several examples found on StackExchange:

rename foo foo1 *.foo

and

find . -name '*.foo' -execdir rename 's/.foo$/.foo1/' ;

Both generate the following error multiple times:

rename: not enough arguments

Any ideas appreciated.

Your use of rename might not work everywhere. Another way to achieve this is to use find, mv, and some bash substitution.

find . -name '*.foo' -exec bash -c 'mv "$0" "$0%.foo.foo1"' "" ;

A few things to note:

I use -exec and not -execdir. The latter effectively cds to the directory of the matched file (which isn't what you want, because then the path to the file--which will be relative to .--will no longer be correct). You want just -exec which will run the given command for each file that matches -name '*.foo' (replacing with the path to the matched file).

"$0%.foo" strips the extension .foo so if $0 is "hello.foo" then "$0%.foo" ends up as "hello". Then adding .foo1 to the end just appends that, so "$0%.foo.foo1" is "hello.foo1".

Use a for loop

for f in *.foo
do
 mv $f $f/.foo/.foo1
done