I am using nohup command to run a java web server application. This is the command i am using:

nohup java -jar WEB-SNAPSHOT.jar &

This command will create a nohup.out and my server logs are stored in this file. I want this file creation based on date i.e if current date is 2017-10-28, file should be created nohup.2017-10-28.out and when the date becomes 2017-10-29 12:00 AM nohup.2017-10-29.out file should be automatically created and so on . Example:

DATE       | File 
2017-10-28 | nohup.2017-10-28.out
2017-10-29 | nohup.2017-10-29.out
2017-10-30 | nohup.2017-10-30.out 

You can just redirect the output to a file.

nohup java -jar WEB-SNAPSHOT.jar > nohup.$(date --iso).out

If you redirect, nohup will not create the default file, but will use the file specified with the redirect.
I also think you do not need the & at the end of your command.

  • Consider current date is 2017-10-28 at 2017-10-29 12:00 AM does this command create nohup.2017-10-29.out file – Zinc Oct 28 '17 at 15:24
  • Nope, nohup redirects to the file specified. It does not alter the output file. If you want to have a new filename you would have to stop the current instance and reexeute the command or use logrotate or similar. – Thomas Oct 28 '17 at 15:28
  • Could you please answer with logrotate bcoz i am unable to find any useful result from google search – Zinc Oct 28 '17 at 16:11

If the goal is to background a process and log its stdout to a file, there are more features available if you implement it as a service.

Create a systemd service that starts a command similar to ExecStart=/usr/bin/java -jar /opt/app/WEB-SNAPSHOT.tar

Also set it to log to a unique syslog destination as described in systemd.exec


Set syslog to log that facility to its own file like /var/log/app.log

Configure /etc/logrotate.d/app to rotate the file. Use dateformat and postrotate scripts as necessary.

  • Thanks for your answer but I am facing difficulty in understanding your answer as I am not a expert in linux. Could you provide me more information – Zinc Oct 29 '17 at 15:12
  • systemd manages many things including services. If you were to write a .service unit, you can start, stop, and manage the logging of a process. To learn more, read documentation like the RHEL guide to Creating and Modifying systemd Unit Files. – John Mahowald Oct 29 '17 at 19:45

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.