host file

[vti]

Hi ,
I need a script to ping all /etc/hosts file entries and find out if are there any entries in this file which i don't need.I think to find out ping would be fine but if you got any diferent idea it would be cool too.

Thanks

 

[johngiggs]

VTI,

Something like this should work fine:

for server in `cat /etc/hosts | awk '{print $2}'`

do ping $server >> /tmp/ping.out
done

grep -v alive /tmp/ping.out > /tmp/notalive.out

cat /tmp/notalive.out | mailx -s "Hosts That Are Not Responding" abc@abc.com

Thanks,

John

 

[johngiggs]

You may need to change the following line:

for server in `cat /etc/hosts | awk '{print $2}'`

to

for server in `cat /etc/hosts | grep -v ^# | awk '{print $2}'`

Thanks,

John

 

[vgersh99]

or you can even change it to:

for server in $(nawk '/^[^#].*/ {print $2}' /etc/hosts) vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[vti]

hi ,
Thanks for answers .I tried all but it only pings the first line (local host) but i need to ping all entries and if it's pinging doesn't matter but is there any entries i can not ping i am gonna remove them from hosts file.So i need to find only entries i don't need.

 

[johngiggs]

The script that I gave you should work fine.

for server in `cat /etc/hosts | grep -v ^# | awk '{print $2}'`

do ping $server >> /tmp/ping.out
done

grep -v alive /tmp/ping.out > /tmp/notalive.out

cat /tmp/notalive.out | mailx -s &quot;Hosts That Are Not Responding&quot; abc@abc.com

Are you getting any error messages? Did it create the output files ping.out and notalive.out?

Thanks,

John

 

[clonny2]

Here is a quickie, however it will try to ping blank lines. I did not have time to fix it

sed -e/^#/d /etc/host | cut -f 1 > tmp.hosts

while read line x
do
eval &quot;ping -w 1 -c 1 ${line}&quot;
done < tmp.hosts

 

[vti]

thank you all,they all works fine.