diff -rq -x .svn ./work/myproject/ ./work/myproject-copy2/
</source>
The <code>diff</code> command is fast, but often the output is hard to read to find the exact difference. You might try piping the output of the diff command to a graphical tool:
<source lang="bash">
diff fileA fileB | kdiff3 -
</source>
By using the dash option to kdiff3, you're telling it to read from STDIN, so it uses the output of the former commands being piped to it.
=== Compressed files ===
<code>zdiff</code> is a tool that can be used directly on compressed files (like zcat, zgrep, etc.)
== KDiff3 ==