ISUP

Section: CSLib Utilities (1)
Updated: April 20, 2002
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NAME

isup - Find out if a machine is up by trying a TCP/IP connection

SYNOPSIS

isup [ -p ] host [ port ]

DESCRIPTION

isup 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.

-p: Also print out an explanatory line of whether the machine is available or not, and if not, what the error was.

AUTHOR

isup was written by Alan Ford.

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