 | | | Setting the maximum number files a user can open | Setting the maximum number files a user can open 2003-05-01 - By Simone Crider
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Hi!
I'm in hopes that someone can assist me w/ the following problem ... I
cannot change the ulimit -n value as a regular user. I found the
following documentation ...
Setting the maximum number files a user can open
By the Red Hat Linux Support Team
Issue
User wants to let the user open more files than permitted by default.
Resolution
Here\'s an example on how to give userx the ability to open 16000 file
concurrently.
Set /proc/sys/fs/file-max to the total number of files that can be
openned by all users (eg. in /etc/sysctl.conf, fs.file-max = 20000, then
sysctl -p).
edit /etc/security/limits.conf:
userx hard nofile 16000
login as userx, from command line, enter \"ulimit -n 16000\"
to make permanent, edit /home/userx/.bashrc:
ulimit -n 16000
...
I get the following error when trying to change the value as a regular
user ...
bash: ulimit: cannot modify limit: Operation not permitted
*** The following info is specific to my server ...
$ uname -a
Linux dolphin 2.4.18-27.7.x #1 Fri Mar 14 06:44:53 EST 2003 i686 unknown
# sysctl -a |grep file
fs.file-max = 52362
fs.file-nr = 281 17 52362
# cat /etc/security/limits.conf
...
...
# Added to up the number of open file limits for the following users:
arcims soft nofile 1024
arcims hard nofile 5120
# cat /etc/pam.d/system-auth
...
...
session required /lib/security/pam_limits.so
session required /lib/security/pam_unix.so
I log out & then login as a regular user & get the following error ...
$ ulimit -n 2048
bash: ulimit: cannot modify limit: Operation not permitted
Appears that because I am a non-root user, that I cannot perform this
command. I thought that by changing the hard limit that a regular user
would then be able to modify this value, at least to the hard limit?
Has anyone seen this behavior before? Is there a workaround or am I
missing something?
Any assistance will be greatly appreciated!
Simone Crider
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