is_up
Package: WA2L/edrc 1.5.57
Section: Library Commands (3)
Updated: 03 February 2009
Index
Return to Main Contents
NAME
is_up - test if a host is up
SYNOPSIS
edrc/lib/is_up
-h
is_up host
AVAILABILITY
WA2L/edrc
DESCRIPTION
Test if a host is up by pinging it or by connecting to alternate
ports on the system.
The advantage of using
is_up
instead of
ping(8)
and
ping6(8)
is, that this command has identical usage on different
operating systems.
When
ping
(ICMP echo) is not allowed/enabled to test the peer's availability
is_up
tries to connect to the ports 22 and 513-514.
OPTIONS
- -h
-
print usage message.
- host
-
name or IP address of host to test.
ENVIRONMENT
-
EXIT STATUS
- 0
-
host reached.
- 1
-
host not reached.
- 2
-
operating system not supported. See
osid(3)
if you get this error.
- 4
-
usage message printed.
FILES
-
EXAMPLES
-
SEE ALSO
edrcintro(1),
nc(3),
ping(8),
ping6(8),
portscan(3),
rsh(1),
ssh(1)
NOTES
-
BUGS
-
AUTHOR
is_up was developed by Christian Walther. Send suggestions
and bug reports to wa2l@users.sourceforge.net .
COPYRIGHT
Copyright © 2009
Christian Walther
This is free software; see
edrc/doc/COPYING
for copying conditions. There is ABSOLUTELY NO WARRANTY; not
even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This document was created by man2html
using the manual pages.
Time: 16:53:17 GMT, August 28, 2024