Need help in script

[Waqar Razi]

We have a HPUX server, where printers have been defined as queues. There are some printers which are not valid, either they have been replaced or have been shutdown (their IP's have been changed). I want to write a script which ping every printer in the list and then make a list which printers are not pingable.

Can some one please help me in this?

[James R. Ferguson · Accepted solution]

Hi Wagar:

# cat ./pinghosts
#!/usr/bin/sh
while read HOST X
do
ping ${HOST} -n 1 >/dev/null 2>&1
[ $? = 0 ] || echo "'${HOST}' does not answer"
done < pinghosts.lst
exit 0

# cat ./pinghosts.lst
hostname1
hostname2
hostname3

...run as:

# ./pinghosts

Regards!

...JRF...

[Waqar Razi]

Hey James,

I tried this script as follows:

I made a list of all the printers as pinghosts.lst and then ran your script. It only points out the printers who are not present in DNS or failed in name resolution but not the ones who have been defined in DNS but are not pingable.
ping aguawhinv2200 -n 2
PING aguawhinv2200.col.com: 64 byte packets

----aguawhinv2200.col.com PING Statistics----
2 packets transmitted, 0 packets received, 100% packet loss
/home/root # echo $?
0

As you can see, it returns a code 0 for the host who is defined in DNS but you cant ping it as it is down or unavailable.

Can you please give me some guidance in this regard?

[James R. Ferguson]

Hi (again):

Sorry about that. Try this:

#!/usr/bin/sh
while read HOST X
do
ping ${HOST} -n 1 | grep -q "100% packet loss" && echo "'${HOST}' is down"
done < hostlist
exit 0

Regards!

...JRF...

[Waqar Razi]

Thank you very much