ulimit error while changing max files to unlimited: PAM / sshd options?

[Carl T. Miller]

Yes, ulimit only lets you set a number up to the hard
limit that is set for your shell.  Both hard and soft
limits are set to 1024 by default unless the limits.conf
file has been configured _before_ the shell is started.

I know this works with numbers, since I set hard and
soft limits to 10240 for select users.  Try using a
number less than the total for the system instead of
unlimited.

c


Rahul Nabar wrote:
> I tried changing the max limit on the number of open files but get an
> error:
>
> ssh root at eu033
> [root at eu033 ~]# ulimit -n unlimited
> -bash: ulimit: open files: cannot modify limit: Operation not permitted
>
> I verified that /etc/security/limits.conf has these two lines:
> *               hard    nofile          unlimited
> *               soft    nofile          unlimited
>
> The default kernel limits seem high enough:
> [root at eu033 ~]# cat /proc/sys/fs/file-max
> 1585781
>
> [root at eu033 ~]# sysctl -a|grep fs.file-max
> fs.file-max = 1585781
>
> So why is my change via ulimit being rejected? What else could be
> setting the limit at 1024. Any ideas how else I can get the file-limit
> to be set to unlimited?
>
> Actually, I am not even sure limits.conf is being used since I have
> the following lines in the file /etc/ssh/sshd_config
>
> UsePAM no
> UsePrivilegeSeparation no
>
> --
> Rahul
>
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