I'm trying to compare two directories that contain binary files, on AIX 6.  I'm using diff in preference to dircmp, as I'm trying to maintain a consistent output format between this and my Linux servers, where dircmp is not available.According to the diff man page, If the Directory1 and Directory2 parameters are specified, the diff         command compares the text files that have the same name in both         directories. Binary files that differ, common subdirectories, and files         that appear in only one directory are listed.However, the binary files are also being compared, and their differences output to stdout, resulting in the terminal screen being flooded with unprintable characters, even modifying the size of my window (I'm using pUTTY).  The version of diff doesn't have the -q option.  Is there any way to suppress this output and just report that the files differ?  I'd prefer not to use rsync -n, as that needs to be run twice, with to and from parameters reversed, to find missing files on both sides.Related questions: here and here
Comparing directories using diff
directory;aix;diff