Shell Programming and Scripting

I am trying to have a script ping all the clients then output it to a file so I know which clients are off then have the next script pull the ones that are online and reboot them.

This is what I am running with right now. If there is something KISS then by all means please let me know.

#!/bin/csh
foreach i (`grep xx /etc/hosts |awk '{print $2}'`)
echo $i
ping ${i} 2 > /tmp/results

this creates a file that has the contents as follows

abcxx123 is alive
no answer from abcxx456

I need the hostname of the ones that are alive to be rebooted but I am not sure how to pull that information from the file. do I need to parse it out?

so the end result would be the following

#!/bin/csh
foreach i (`grep xx /etc/hosts |awk '{print $2}'`)
echo $i
ping ${i} 2 > /tmp/results
end
foreach x (PULL THE RESULTS FROM THE FILE)
echo $x
rsh ${x} init 6
end

Thanks for any help and advice

Can you Pls post what is the input file content ?..

Wht output u r expecting ?...

I did n' see anything like "alive" or "no answer from ..." in my /etc/hosts file . Don't know based on wht your doing grep.

Code:

 #!/bin/csh
foreach i (`grep xxx /etc/hosts |awk '{print $2}'`)
echo $i
ping ${i} 2 > /tmp/results 
end

Contents of the results file

Code:

 
herexxx001 is alive
herexxx002 is alive
no answer from herexxx003
no answer from herexxx004

Next line of code

Code:

 cat results |grep alive > /tmp/alive

contents of the alive file

Code:

herexxx001 is alive
herexxx002 is alive

Next Line of the script

Code:

cat /tmp/alive |awk '{print $1}' > /tmp/start

Contents of the start file

Code:

herexxx001
herexxx002

the last line of code

Code:

 foreach x (`grep xxx /tmp/start |awk '{print $1}'`)
echo $x
rsh ${x} init 6
end

my problem now is when i only execute the ping portion of the script i do not get the expected outcome. I have 5 clients that are on the network and alive and the rest of the clients are off. The results file only shows

Code:

herexxx021 is alive

when in fact there are 5 total and nothing else is in the file. did i redirect the out put incorrectly?

sorry i figured out why instead of > i needed a >>/tmp/results i was overwriting each line over and over.