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-XTruss is an easy to use X protocol tracing program.
+xtruss (easy to use X protocol tracing program)
-It logs everything that passes between the X server and one or more X client
-programs. In this it is similar to xmon(1), but intended to combine xmon's
-basic functionality with an interface much more similar to strace(1).
+xtruss logs everything that passes between the X server and one or more
+X client programs. In this it is similar to xmon(1), but intended to
+combine xmon's basic functionality with an interface much more similar
+to strace(1).
+
+If xtruss hangs on startup or aborts with a 'sk_addrcopy'
+message, make sure your hostname (hostname -f) resolves to
+your primary IP address. Add an entry in /etc/hosts if necessary.
+This is especially prevalent on residential LANs using DHCP.