Manpage of ISUP
Section: CSLib Utilities (1)
Updated: August 2003
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isup - Find out if a machine is up by trying a TCP/IP connection
[ -v ] [ -a ] host [ port ]
tries to create a TCP/IP connection to host (optionally on port
port, default is TCP 7, i.e. echo). If the machine is up (i.e.
the connection is accepted, or refused), then zero (success) is returned.
A non-zero error code is returned if the connection fails.
- -v, --verbose
Also print out an explanatory line of whether the machine is available
or not, and if not, what the error was.
- -a, --available
Will only return success if a connection can actually be made on the
specified port - connection refused will return a non-zero error code.
- -h, --help
Display usage information.
was written by Alan Ford.
- SEE ALSO
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Time: 09:47:17 GMT, August 13, 2003