On May 7, 2004 08:54 am, Greg Bradner wrote: > Within an init.d startup script, I would like to check if a host is up > before continuing. > ex: > in the ntpd script, if ntp.server.com is not pingable, exit - instead of > waiting for the long timeout period. > > Any suggestions? > > > -- > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > gregb@xxxxxxxxxx Hi, there are a few things to consider. -how many ping attempts before it fails -can the server be ping'd -you may want to consider using traceroute to the NTP port 525(?) Here is andea for the basic ping part: #!/bin/bash TARGET="$1" TEST_RESULTS="/tmp/alive_test.txt" if [ -z "$TARGET" ] ; then echo "usage: alive.sh host.domain.com" exit fi rm -rf $TEST_RESULTS ping -c 3 $TARGET|grep "64 bytes" > $TEST_RESULTS if [ -s "$TEST_RESULTS" ] ; then echo "`cat $TEST_RESULTS`" # <-put your init script here else echo "Server is not available. Script failed" fi #end if script This is not very refined or tested except for basic functionality Hope that helps -- Pete Nesbitt, rhce -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
