Hi Patrick, as Stephan told, the "MARK"s are written by syslogd. top needs the "right" tty settings to work, because it uses control characters to refresh what it is displaying. I guess you invoked it in a somewhat misbehaving telnet session (maybe on a Windows machine). It should work in an xterm or at least at the console. If you need it in your telnet, you have probably to tune this tty (from inside) with the "stty" command , so this is maybe the FM you should R (I never did this myself, sorry).
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