~ # ulimit
unlimited
~ # cat /proc/version
Linux version 2.6.24.4 (brian@dualla) (gcc version 4.2.4) #1 Tue Feb 10 11:00:22 GMT 2009
~ # ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) unlimited
stack(kbytes) 8192
coredump(blocks) 0
memory(kbytes) unlimited
locked memory(kbytes) 32
process 1024
nofiles 1024
vmemory(kbytes) unlimited
locks unlimited
~ #
~ # ls -l /proc/4281/fd | wc -l
ls: /proc/4281/fd/327: No such file or directory
ls: /proc/4281/fd/428: No such file or directory
ls: /proc/4281/fd/688: No such file or directory
ls: /proc/4281/fd/748: No such file or directory
ls: /proc/4281/fd/797: No such file or directory
ls: /proc/4281/fd/798: No such file or directory
ls: /proc/4281/fd/803: No such file or directory
ls: /proc/4281/fd/856: No such file or directory
ls: /proc/4281/fd/957: No such file or directory
ls: /proc/4281/fd/972: No such file or directory
ls: /proc/4281/fd/973: No such file or directory
969
~ #
[root@pink ~]# ulimit -n
1024
[root@pink ~]# ulimit -n 2048
[root@pink ~]# ulimit -n
2048
[root@pink ~]# sh
sh-4.1# ulimit -n
2048
[root@pink ~]# ulimit -n
1024
[root@pink ~]# ulimit -n 2048
[root@pink ~]# ulimit -n
2048
[root@pink ~]# sh
sh-4.1# ulimit -n
2048
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