whats wrong with my ssh

[meetramana]

Hi,

Datafile contains:
SERVER1
SERVER2
SERVER3
.....
......


Script:

while read server;
do
echo "checking for server $server"
ssh $server "ps -ef | grep processname"
done < Datafile

Isn't above script supposed to loop through all the servers in the Datafile.

right now it just runs for the first line and then stops.
any ideas what could be wrong.

it echos all the servers fine if I comment out the ssh line

 

[PHV]

Seems that ssh "eats" the standard input ...
You may try this (ksh-like):
for server in $(<Datafile)
do
echo "checking for server $server"
ssh $server "ps -ef | grep processname"
done

For bourne-like:
for server in `cat Datafile`

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[meetramana]

that works

Thankyou

 

[p5wizard]

other solution:

while read server;
do
echo "checking for server $server"
ssh $server "ps -ef | grep processname" </dev/null
done < Datafile


HTH,

p5wizard

 

[meetramana]

The other solution also works,
any idea why it was eating the standard input?
Thankyou

 

[p5wizard]

No, it just does...

rsh does that also.

HTH,

p5wizard

 

[Annihilannic]

Use the -n option for ssh or rsh to prevent it gobbling stdin.

Annihilannic.