Find files and directories with permissions 775 / 644
-
Or more precisely, find files and directories with permissions other than 755 / 664:
find -type d -not -perm 755 -o -type f -not -perm 644
or find files that have at least the permissions 644 but don't have 644 as the permission bits:
find -perm -644 ! -perm 644 -type f
-type f
will restrict to regular files (exclude directories) and vice-versa:find -perm -755 ! -perm 755 -type d
- to exclude files.