[SOLVED] Unable to change ulimit in 'screen'

cypollux · 12-01-2016, 08:37 PM

Hi everyone,

I'd like to know if, changing the ulimit would have an effect in the operations that are carried-out using 'screen'.

I'm using 'screen' to carry-on some operations using multiple processes, for this I need to change the number of files that can be used simoultaneously. I used first 'ulimit -n 9999' in the command line, no problem, but then I tried to do it in the 'screen' as I need to shut-off the pc during non-office times.

I haven't been able to do so, it always retrieve 4096. I even edited the /etc/security/limits.conf file by adding my username and "hard/soft nofile 9999" at the end of it. Nothing changed. I'm suspecting that this has no effect when I use the screens, my process is 'killed' after less than 1000 operations.

I'll appreciate any help

Cya

rtmistler · 12-02-2016, 07:41 AM

Hi cypollux, and welcome to LQ.

Yes a bit more information may be helpful. Besides the distribution which you're running, also informing a bit more about what you mean by screens. My assumption is that you mean the desktop, but please clarify.

Since you cite the number of files, and that the default is 4096, it then seems unusual that your process is being killed at less than 1000 operations, which once again I'm assuming this means "open files"?

Can you explain more what these processes are? Have you written a script or program to open files? Given that this fails below the system default limits, I wonder if there may be some other problem here.

cypollux · 12-03-2016, 08:35 AM

Quote:

Originally Posted by rtmistler

Hi cypollux, and welcome to LQ.

Yes a bit more information may be helpful. Besides the distribution which you're running, also informing a bit more about what you mean by screens. My assumption is that you mean the desktop, but please clarify.

Since you cite the number of files, and that the default is 4096, it then seems unusual that your process is being killed at less than 1000 operations, which once again I'm assuming this means "open files"?

Can you explain more what these processes are? Have you written a script or program to open files? Given that this fails below the system default limits, I wonder if there may be some other problem here.

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Hi, thank you for your reply and sorry for my vague start...

I'm using linux through the command line only. By 'screen' I meant the use of multiple terminals to carry-out different operations.

http://www.tecmint.com/screen-comman...nux-terminals/

The process was killed only inside the screen, I didn't know how to increase the number of open files (yes you are right) in the way that it had an effect also in the 'screen'. However, I found out that by killing the screen (with exit) and starting over a new screen, I already get the number of open files that I need and set previously (9999), so it seems that it was a matter of re-starting the sessions. [problem solved]

Thank you again!