setting nproc in /etc/security/limit.conf prevents ssh login

Posted by omry on Server Fault See other posts from Server Fault or by omry
Published on 2010-03-18T06:39:07Z Indexed on 2010/03/18 6:41 UTC
Read the original article Hit count: 313

Filed under:

ulimit

|

linux

|

ssh

I am trying to use /etc/security/limit.conf on Linux (Debian) to limit the number of processes per user.

for starters, I tried to limit my own user processes by adding this to /etc/security/limit.conf:

omry hard nproc 100

this locked my user out of ssh. I could open new processes (verified with su omry), but could not log into ssh with that user : sshd reported this in it's log:

fatal: setreuid 1000: Resource temporarily unavailable

also, I am certain my user is not running anything near 100 processes (actually 6). what can be the reason for this?

© Server Fault or respective owner

Related posts about ulimit

setting ulimit and ubuntu 8.04

as seen on Server Fault - Search for 'Server Fault'
Hi there, We have two ubuntu 8.04 servers. With the database server I set the table_cache to 1000 however when I restart mysql the status only shows 257 and the open files limit says 1024 I adjusted ulimit by doing ulimit -n 8192 and then restarting mysql; this seemed to do the tick however after… >>> More
ulimit for windows

as seen on Server Fault - Search for 'Server Fault'
Hi Are there true ulimit for windows? I'm finding ways/programs how to prevent one program eating 100% cpu. Thanks. >>> More
daemontools and ulimit

as seen on Super User - Search for 'Super User'
I have a service run under daemontools defined like: /service/myservice/run = #!/bin/sh exec setuidgid someuser somecommand Now, if I run this as a script directly from a root shell, somecommand will get a correct ulimit (unlimited). However, when I start the service using svc -u /service/myservice then… >>> More
Why does limiting my virtual memory to 512MB with ulimit -v crash the JVM?

as seen on Super User - Search for 'Super User'
I am trying to enforce maximum memory a program can consume on a Unix system. I thought ulimit -v should do the trick. Here is a sample Java program I have written for testing : import java.util.*; import java.io.*; public class EatMem { public static void main(String[] args) throws IOException… >>> More
ulimit not reflected for jenkins slave

as seen on Server Fault - Search for 'Server Fault'
Problem Got java.io.IOException: Too many open files in solr indexing through jenkins. Did some googling and found we have to set the ulimit for the box in where we are running the job. So set the ulimit in a linux box with spec Linux x86_64 GNU/Linux in both of the following fashions ulimit… >>> More

Related posts about linux

apt-get install and update fail

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I've got a problem with apt-get update and apt-get install ... commands . every time update or installing fails and errors are : Get:1 http://dl.google.com stable Release.gpg [198B] Ign http://dl.google.com/linux/chrome/deb/ stable/main Translation-en_US Get:2 http://dl… >>> More
kernel module compiling error

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
sh@ubuntu:/home/ccpp/helloworld$ make gcc-4.6 -O2 -DMODULE -D_KERNEL_ -W -Wall -Wstrict-prototypes -Wmissing-prototypes -isystem /lib/modules/`uname -r`/build/include -c -o hello-1.o hello-1.c hello-1.c:4:0: warning: "MODULE" redefined [enabled by default] <command-line>:0:0: note: this is… >>> More
Build-Essentials installation failing

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I am having trouble accessing the several critical header files that show to be a part of the build process. The "Ubuntu Software Center" shows "Build Essentials" as installed: Next I did the following two commands, which did not improve the problem: ~$ sudo apt-get install build-essential [sudo]… >>> More
Updating Debian kernel

as seen on Super User - Search for 'Super User'
I'm trying to update my Debian machine to 2.6.32-46 (which is the new stable). However, after doing apt-get update my apt-cache search linux-image shows me: linux-headers-2.6.32-5-486 - Header files for Linux 2.6.32-5-486 linux-headers-2.6.32-5-686-bigmem - Header files for Linux 2.6.32-5-686-bigmem linux-headers-2… >>> More
Serial connection over a single USB cable (Windows to linux, or linux to linux)

as seen on Server Fault - Search for 'Server Fault'
I'm helping out with a project for an embedded device that only has USB and no serial. This device is running Linux. These days, when we need to connect to a serial port on a device we typically use a USB to serial adapter (on something like a phone system or a load balancing device, etc). I would… >>> More