CODEWITHSUNDEEP
linux
Ahmet Karakaya
Ahmet Karakaya

Reputation: 10139

Run Remote Linux Script as if I am at remote machine

I am able to run remote script in two ways. First (indirect) #ssh Second (after ssh connection) #ssh # #exit (back to host terminal)

I believe that there is some difference in type of channel forwarding. In other words when I used fist way fo running remote script, output of script should be printed not host mashine but remote one like that of the second way.

I have two machines uturksat1 and uturksat2 In uturksat2, I have a linux script (/tmp/runScript.sh) and Java class Provider. Linux script runs the Provider java application which is open a socket then listening it.

#!/bin/bash
echo "Provider"
$JAVA_HOME/bin/java -cp /tmp  Provider&
$JAVA_HOME/bin/java -version
rm  /tmp/pid
echo "$!"> /tmp/pid
echo "Provider-finish"
exit 0

On uturksat1 machine, I have type following command 

root@UTURKSAT1:/tmp# ssh  uturksat2 /tmp/runScript.sh
Provider
java version "1.6.0_29"
Java(TM) SE Runtime Environment (build 1.6.0_29-b11)
Java HotSpot(TM) Client VM (build 20.4-b02, mixed mode, sharing)
Provider-finish
Waiting for connection

It does not return command prompt automatically, I have to press ctrl+c to return

When I have type the following command:

root@UTURKSAT1:/tmp# ssh -t  uturksat2 /tmp/runScript.sh
Provider
Waiting for connection
java version "1.6.0_29"
Java(TM) SE Runtime Environment (build 1.6.0_29-b11)
Java HotSpot(TM) Client VM (build 20.4-b02, mixed mode, sharing)
Provider-finish
Connection to uturksat2 closed.
root@UTURKSAT1:/tmp#

Provider app is not run, I can test it through telnet to port 2004 which Provider is listening.

telnet  uturksat2 2004

Finally last problem is that Provider uses log4j to keep its internall log, in the first way of remote linux script execution, log4j lof file is not created, but in the second way it is created.

Upvotes: 0

Views: 694

Answers (2)

Ahmet Karakaya
Ahmet Karakaya

Reputation: 10139

I have openned same question with different explanation. It has been solved. Thanks your advices which keep my motivation high. Here is the solution as you have already known. Run remote java server in linux script

Upvotes: 0

Igor Chubin
Igor Chubin

Reputation: 64563

The only difference between these two commands:

ssh second
script
exit

and

ssh second script

is that in the second case, the script will be started without terminal. To force terminal in the second case you must specify -t:

ssh -t second script

Update.1

If you want to start the script in the background and leave ssh session:

ssh second 'nohup script < /dev/null > nohup.out 2>&1 &'

Upvotes: 2

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