I want to echo a message in case a system is reachable by ping or echo a different message in case it's not reachable.
Sample code i wrote is
Code:
ping localhost -n 2 | grep 'ttl' > ping_op; ls ping_op > /dev/null && drReachable=Alive; echo -e `date`: \\t "DR server is reachable" >> dr_check.log
i thought if the grep command finds ttl only then it will create a file but it does not seem like that.
How can i achieve conditional execution for the same
i thought i will o/p the command to a file and do a line count but it is fine for hpux but it doesn't work for solaris, which outputs a single line, not reachable or alive.
I'm new to this stuff. maybe there are better approaches
Moderator's Comments:
Use code tags please, ty.
Last edited by zaxxon; 06-15-2010 at 03:04 AM..
Reason: code tags
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Discussion started by: mrm5102
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LEARN ABOUT MOJAVE
tping
TPING(1) LAM COMMANDS TPING(1)NAME
tping - Send echo messages to LAM nodes.
SYNOPSIS
tping [-hv] [-c count] [-d delay] [-l length] nodes
OPTIONS -h Print the command help menu.
-v Turn OFF verbose mode.
-c count Send count messages.
-d delay Delay delay seconds between each message.
-l length Each message is length bytes long.
DESCRIPTION
The tping command sends messages to, and collects replies from, a list of nodes, via the LAM echo server. It is similar to the UNIX
ping(8) command, and is used as a quick diagnosis of the LAM network.
Unless options are specified, tping sends a 1 byte message an infinite number of times, displaying the roundtrip time of each message as it
completes, with a delay of 1 second between roundtrips. After the loop is broken (with keyboard interrupt, eg: ^C), tping prints statis-
tics about all roundtrip messages.
EXAMPLES
tping h
Echo messages to the local node.
tping -v n7 -l 1000 -c 10
Echo 1000 byte messages to node 7. Stay silent while working. Stop after 10 roundtrips and report statistics.
BUGS
There is no built-in timeout and tping will wait forever to receive an echo. If no echo is received, due to a dead link or node, tping
hangs. Stop the process with a keyboard suspend signal (eg: ^Z) and terminate LAM with lamhalt(1) or lamwipe(1) (although the use of
lamwipe(1) is deprecated).
SEE ALSO lamhalt(1), lamwipe(1)LAM 7.1.4 July, 2007 TPING(1)
06-15-2010
