CODEWITHSUNDEEP
javasshjschsshj
Michael Sobczak
Michael Sobczak

Reputation: 1085

sshj executing script using nohup

I need to execute a shell script via sshj and disconnect without waiting for the script to complete. The script can take a long time to complete, so I will be creating additional Java code to periodically check for results from the script. How would do I disconnect the sshj session without waiting for the shell script to complete?

Upvotes: 3

Views: 1148

Answers (1)

bstempi
bstempi

Reputation: 2043

End your command with &. Example:

nohup /usr/bin/longRunningProcess &

Once that command is submitted (eg, submit the command and then call Command.join()), you can disconnect, and longRunningProcess will continue in the background. The other thing to worry about is the command's output. You will have to redirect stdout and stderr elsewhere, such as a file of /dev/null. So, the command will look something like this:

nohup /usr/bin/longRunningProcess > /dev/null 2>&1 &

And the Java code would be something like:

SSHClient client = ...
Session session = ...
Command command = session.exec(yourCommand);

// Wait for command to be submitted
command.join();

// Do some error checking by checking command.getExitStatus()
...

// Disconnect
session.close();
client.close();

Upvotes: 2

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