CODEWITHSUNDEEP
linuxbashshellssh
jgr208
jgr208

Reputation: 3066

Execute the last lines of shell script after SSH diconnection

I have a shell script that is used to setup the network settings on a linux machine in bash, it will mainly be used over SSH. Here are the last few lines of the script. 

service network stop
rm -rf $NETWORKFILE
touch $NETWORKFILE
echo NETWORKING=yes > $NETWORKFILE
echo HOSTNAME=$HOSTNAME >> $NETWORKFILE
mv $ETHFILE /etc/sysconfig/network-scripts/ifcfg-eth0
service network start

As you can see, to apply the network settings it has to stop then start the network and apply the settings while the network is down. This would then cause the SSH session to be disconnected on the first line of the code I have shown and the script to thus stop and the settings to not be applied. How can I have the shell script run these last few lines after the SSH session is disconnected that started the shell script? Also, it needs to be done in the code and not through a screen or nohup command when starting the script.

Upvotes: 0

Views: 92

Answers (2)

Abhay
Abhay

Reputation: 768

Try completely disconnecting the script from the terminal, by redirecting all standard streams and putting it in background:

nohup script < /dev/null > script.log 2>&1 &

Also you can put "sleep 2" as the first line of the script, so that after putting the script in background, you can quickly disconnect cleanly, before the server closes it forcibly. This is just for convenience.

Upvotes: 1

Favo
Favo

Reputation: 838

Maybe if you get your script PID, and then disown the process after stopping the network, your script will continue running after the ssh session is disconnected.

./script & 


    pid=$$ 
    disown -h $pid 
    service network stop
    rm -rf $NETWORKFILE
    touch $NETWORKFILE
    echo NETWORKING=yes > $NETWORKFILE
    echo HOSTNAME=$HOSTNAME >> $NETWORKFILE
    mv $ETHFILE /etc/sysconfig/network-scripts/ifcfg-eth0
    service network start

Upvotes: 0

Related Questions