I will be running some batch process on Amazon EC2 Ubuntu 12 machines. I can log in using putty, run the command. The process will run for a day or two. There is a chance the putty will get disconnected. However I need the program keep running on the remote Ubuntu machine. Is it possible?
Like Windows RDP, log in to a machine, start some app, disconnect, come back later, app is still running. Similar experience in Ubuntu, how can I get? Thank you.
Thanks/.
Screen. You will probably need to install it with apt-get install screen or similar, but once you have it, it's quite straight forward. Use screen to start it, and you will be given a bash or sh shell, use that to run your batch job, then use Ctrl+A followed by Ctrl+D to detach from the session. You may then log out, and can reattach at any time using screen -r. See man screen for more information. You could also simply fork the job to the background with an ampersand, ./job.sh &, but you will not be able to reattach to it at some later point in time.
use nohup and & with your command / batch process. RUn you script or command like below
nohup command &
even your putty session disconnect your command will continue to run in background.
telnet, you're in BIG trouble. Please usessh!telnet, but i can't explain why the question includes it.C:\>and then executing putty then login in to 12 different boxes and running a command seem far more "roundabout" then have a simple cron job on each of the boxes. I guess to some people setting up a cronjob is difficult. To each his own I guess.