How to only find files in a given directory, and ignore subdirectories using bash

If you just want to limit the find to the first level you can do:

 find /dev -maxdepth 1 -name 'abc-*'

... or if you particularly want to exclude the .udev directory, you can do:

 find /dev -name '.udev' -prune -o -name 'abc-*' -print

Is there any particular reason that you need to use find? You can just use ls to find files that match a pattern in a directory.

ls /dev/abc-*

If you do need to use find, you can use the -maxdepth 1 switch to only apply to the specified directory.

This may do what you want:

find /dev \( ! -name /dev -prune \) -type f -print