command that does the opposite of diff

[shortridge11]

I have 2 folders with certain files. These files take up space, and there are a large amount of them in both folders. Going through them manually would take forever, so is there a command or flag for diff that i don't understand that can output any folders or files that are in both folders? I don't need recursive check, just in the top level of the 2 folders. I tried man diff, but couldn't come up with anything.

[geirha]

How about this?

LANG=C diff -qs dir1/ dir2/
LANG=C diff -qs dir1/ dir2/ | grep identical$

[shortridge11]

that didn't work. i put 2 folders with the same name in for testing purposes, and nothing was outputed

[t0p]

There is a program called uniq that can report or omit repeated lines in a file. Check out its man page, maybe you can make it report repeated filenames in a directory.

[geirha]

Ah, well diff only compares the content of files. To find files and folders with the same name, you could try find like this:

cd dir1
find . -exec test -e /path/to/dir2/{} \; -print

[shortridge11]

Ah, well diff only compares the content of files. To find files and folders with the same name, you could try find like this:

cd dir1
find . -exec test -e /path/to/dir2/{} \; -print

that worked and it also did the sub directories. is there a way to not do the sub directories?

[geirha]

that worked and it also did the sub directories. is there a way to not do the sub directories?

Yes, with find's -maxdepth option

cd dir1; find . -maxdepth 1 -exec test -e /path/to/dir2/{} \; -print

[shortridge11]

that is awesome, that worked amazingly, thanks a lot! =D