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adante n00b
Joined: 08 Jan 2004 Posts: 27
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Posted: Wed Mar 28, 2007 11:51 am Post subject: how do i make ulimit settings... apply? |
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Hi, I am having some trouble applying limit settings
In my /etc/limits, I have tried the following entries
Code: | adante N4096
* N4096 |
Just for the heck of it I have also put into /etc/security/limits.conf
Code: |
adante soft nofiles 4096
adante hard nofiles 8192
* soft nofiles 4096
* hard nofiles 8192
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and also added
Code: | session required /lib/security/pam_limits.so |
to /etc/pam.d/login
But when I login:
Code: | Using username "adante".
Authenticating with public key ""
Last login: Wed Mar 28 21:45:40 2007 from 192.168.1.67
adante@pveer ~ $ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
max locked memory (kbytes, -l) 32
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 16383
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
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The limits still do not work.
What is the secret behind getting them to work? All the documentation tells me I need to re-login. I have done this, but still the file limit is 1024. Do I need to reboot? Physically login to terminal? Log out of all instances? Is this mentioned anywhere? |
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embobo Guru
Joined: 19 May 2003 Posts: 311
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Posted: Thu Mar 29, 2007 6:52 am Post subject: Re: how do i make ulimit settings... apply? |
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adante wrote: | Hi, I am having some trouble applying limit settings
In my /etc/limits, I have tried the following entries
Code: | adante N4096
* N4096 |
Just for the heck of it I have also put into /etc/security/limits.conf
Code: |
adante soft nofiles 4096
adante hard nofiles 8192
* soft nofiles 4096
* hard nofiles 8192
|
and also added
Code: | session required /lib/security/pam_limits.so |
to /etc/pam.d/login
But when I login:
Code: | Using username "adante".
Authenticating with public key ""
Last login: Wed Mar 28 21:45:40 2007 from 192.168.1.67
adante@pveer ~ $ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
max locked memory (kbytes, -l) 32
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 16383
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
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The limits still do not work.
What is the secret behind getting them to work? All the documentation tells me I need to re-login. I have done this, but still the file limit is 1024. Do I need to reboot? Physically login to terminal? Log out of all instances? Is this mentioned anywhere? |
I don't know what checks /etc/limits but the pam module checks /etc/security/limits.conf. The man page
of limits.conf doesn't give "nofiles" as an item. Try "nofile".
Also, in /etc/pam.d/login you can add "debug" after "/lib/security/pam_limits.so". That may help troubleshooting.
You may need to reboot or kill all "login" processes.
If you are ssh'ing to the box you need to have "UseLogin yes" in /etc/ssh/sshd_config. Alternately,
you could put the pam stuff in /etc/pam.d/ssh or possibly /etc/pam.d/system-auth. |
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adante n00b
Joined: 08 Jan 2004 Posts: 27
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Posted: Thu Mar 29, 2007 11:59 pm Post subject: |
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thank you embobo! that worked! |
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qriff n00b
Joined: 04 Dec 2003 Posts: 73
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Posted: Fri Nov 28, 2008 8:02 pm Post subject: |
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1.) edit /etc/security/limits.conf and add
Code: | * hard nofile 8192
* soft nofile 4096 |
2.) edit /etc/pam.d/system-login and add
Code: | session required pam_limits.so |
2.1) (optional) edit /etc/pam.d/login and add
Code: | session required pam_limits.so |
3.) logout and login, type
4.) (optional) add "debug" after pam_limits.so
Code: | session required pam_limits.so debug | and read debug output from /var/log/messages
Code: | sshd[x]: Accepted publickey for user from xxx.xxx.xxx.xxx port xxxxx ssh2
pam_limits(sshd:session): reading settings from '/etc/security/limits.conf'
sshd[x]: pam_limits(sshd:session): process_limit: processing hard nofile 8192 for USER
sshd[x]: pam_limits(sshd:session): process_limit: processing soft nofile 4096 for USER
sshd[x]: pam_unix(sshd:session): session opened for user user by (uid=x) |
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Kalin Tux's lil' helper
Joined: 22 Dec 2002 Posts: 130 Location: Germany
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Posted: Thu May 09, 2013 4:10 pm Post subject: |
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Also, if you are logging via ssh, check /etc/ssh/sshd_confg for `UsePAM yes` :-) That solved my problem. |
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masc n00b
Joined: 29 Dec 2008 Posts: 29
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Posted: Sat Jul 13, 2013 10:22 am Post subject: |
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this setup broke for me after upgrading to pambase-20120417-r2.
when system starts up limits are not applied for services initially.
after restarting services (eg. apache) manually limits are applied correctly.. |
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