UNIX for Dummies Questions & Answers

Hi all,

i am writing a script to test if some servers are down and prompt if test positive. i used rlogin and rsh then exit but the script when run, logs into the servers and stays.
pls what can i do to salvage this? or what other options do you suggest?

hello all,

i'm having a problem with a script i wrote to login to two servers(clusters), i want it to check the second if the first fails i.e link down/file not found/cannot open file. i used the exit status command $? but it returns 0 (success) even if the file cannot be read. please help out.

Could you post some code that does not work?

Are you logging in via telnet or ssh?

Other thread merged.

day=`date '+%d'`

for i in 2 3
do

FILE=MSISDNs/SDP$i\Sub_`date '+%Y%m%d'`.txt
FILECOUNT=MSISDNs/SDP_`date '+%Y%m%d'`.txt

rsh sdp$i\a cat /var/opt/sdp/TT/dump/SDP$i\.DUMP_subscriber$day.csv | awk -F, '{print $1,$7}'|grep ' 1' | awk '{print $1,$2}' >$FILE

||
#if [ $? -ne 0 ]; then

rsh sdp$i\b cat /var/opt/sdp/TT/dump/SDP$i\.DUMP_subscriber$day.csv | awk -F, '{print $1,$7}'|grep ' 1' | awk '{print $1,$2}' >$FILE

#fi

done

#i am using a telnet connection ; the script is supposed to run the second rsh command if the first fails like cannot open file,cannot login to server, file not found and other failures.




Thanks.

Why don't you ping the hosts before attempting a rsh ?

ping -c1 ${host1} 1>/dev/null 2>/dev/null
if [ $? -eq 0 ]
then
rshhost=${host1}
else
ping -c1 ${host2} 1>/dev/null 2>/dev/null
[ $? -ne 0 ] && exit 99
rshhost=${host2}
fi

rsh ${rshhost} "blah blah"

#Return Code 99 means all the cluter nodes are down.

thanks y'all

i tried pinging the hostA and greping the output to check if alive then used an if to check the exit status if successful else ping hostB and do the same if not then send SMS to mobile phones thats where i'm stucked.

Somebody help pls..........