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I try to increase open file limit for certain user on CentOS 5.5 Linux. I added a new line to /etc/security/limits.conf:

seed     hard    nofile          10240

Then do test:

runuser -s /bin/bash - seed -c "ulimit -S -c 0>/dev/null 2>&1; ulimit -a"
0
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 8185
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) unlimited
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

And as you can see - open file limit is still 1024. If I set up the limit as 1000, it will be applied. So, I cannot setup the limit more than 1024.

How can I do that?? I need to set up the settings only for 1 user, not system-wide.