help for high level shell script

kushkothari · 10-26-2008, 11:53 PM

I want to ssh to a server from that server I have to ssh to 5 different nodes and then run 5 different program one on each

my approach:

Code:

xterm  -e "ssh -t  user@server ssh node0  ./x1.sh node0 1" &
xterm  -e "ssh -t  user@server ssh node1  ./x1.sh node1 1" &
xterm  -e "ssh -t  user@server ssh node2  ./x1.sh node2 1" &
xterm  -e "ssh -t  user@server ssh node3  ./x1.sh node3 1" &
xterm  -e "ssh -t  user@server ssh node4  ./x1.sh node4 1"

*x1.sh runs a server or client according to the parameter passed to it.

problem with this code

it opens a window do something and just close it

requirement
i should see first 4 windows and should be able to type on 5 window
with xterm i am not able to get it.

can anyone help me?

abolishtheun · 10-27-2008, 12:39 AM

maybe put the "./x1.sh node0 1" in .profile on the remote hosts?

kushkothari · 10-27-2008, 01:10 AM

no it won't work as I have same memory space for all the node and the server
and even if i have diff. space i have to keep on changing the parameter like node0 node1 node2

abolishtheun · 10-27-2008, 01:25 AM

then maybe:

Code:

 xterm -e 'ssh -t node0 "./x1.sh node0 1  && bash -i"'

?

kushkothari · 10-27-2008, 02:30 AM

thanks for the reply
but still the same problem window is getting closed after few microseconds.

burschik · 10-27-2008, 02:48 AM

As far as I understand it, xterm will close the window as soon as the script you are running on the remote machine has terminated. If you don't want the window to close, you will have to stop that script from terminating.

kushkothari · 10-27-2008, 02:56 AM

ya what u suggested is right I open 5 terminal on my PC and tried these command without xterm and it's working fine

but I have to run these command in new terminal automatically

and I don't know how the window is getting closed because 4 out 5 machine are server and they keep on listening for the client then how it's getting terminate

Could you tell me how to do this might be using something else like konsole (i tried this one but seems doesn't work)

kushkothari · 10-27-2008, 02:58 AM

i tried this code

ssh -t user@server ssh node "./x1.sh node1 1 && bash -i"

it's working fine but I have to do this in new terminal?

gnashley · 10-27-2008, 04:40 AM

A couple of ideas:
xterm -e "/bin/bash -c 'ssh -t user@server ssh node0 ./x1.sh node0 1 &'"

xterm -hold -e "ssh -t user@server ssh node0 ./x1.sh node0 1" &

kushkothari · 10-29-2008, 05:52 PM

Thanks a lot
I tried the second one it's working

I am running server client by using this command on 5 different pcs
when I do it manually like open 5 terminal ssh to server then node then running program on those nodes it's working fine

but when I try to do the same using above command processing speed is very very slow and sometime it do nothing.

another problem is in releasing the port number (as it doesn't happen during the normal run). I think there is some problem when my program is ending. it's not getting closed properly. how can I fix it?

ghostdog74 · 10-29-2008, 08:24 PM

why is there a need to use xterm? am i missing something, because you can just put all your ssh commands in the script.

kushkothari · 10-29-2008, 09:25 PM

I have to ssh to one server then from there i have to ssh to few nodes say 5.
now I have to run 5 different program for each node (server-client program) so all program are connected.
In one of the five window I have to give the input. but before giving input I have to see one value on all the other nodes if it's ok then only I will give the input otherwise I have to restart from initial.

I am using xterm because people in this forum told me to do so I don't know if there is any other way to do so (I am new to linux).

If you have a another way to do so then please help me, Thanks

abolishtheun · 10-29-2008, 10:41 PM

Quote:

Originally Posted by kushkothari

but before giving input I have to see one value on all the other nodes if it's ok then only I will give the input otherwise I have to restart from initial.

Ever thought about automating this step? I mean, how do you know it's "OK" to proceed? If it's by looking at output given by the x1.sh program (does it print "ok to proceed" or something obvious?) then you can just parse the output and automate it.

kushkothari · 10-29-2008, 11:16 PM

following are more details:

Server(node0)-agent3(node1)-agent2(node2)-agent1(node3)-client(node4) that's how I have 5 nodes.

now when I will run my program I have to look for one variable (it will be printed on agent1 itself) at node3 i.e. agent1 if it's 0 it's working fine if not then restart from beginning. I have to run one set for 5 times and there are 18 different sets. that means I have to start and all five program 90 times.

now the problem is when I try to do this using xterm and give ctrl+c instead of only closing the server or client (where ever i am giving ctrl+c) it's directly closing the connection with the server and that's the problem. because my server/client is not properly exited. when I try to run it for another iteration it's facing a problem with port binding. (address is already in use.)