gistfile1.txt

eqbal@ubuntu:~/apps/current$ ulimit -a | grep files
open files                      (-n) 1024
eqbal@ubuntu:~/apps/current$ ulimit -n
1024
eqbal@ubuntu:~/apps/current$ ulimit -n 100000
-bash: ulimit: open files: cannot modify limit: Operation not permitted
eqbal@ubuntu:~/apps/current$ sudo ulimit -n 100000
[sudo] password for eqbal: 
sudo: ulimit: command not found
eqbal@ubuntu:~/apps/current$ sudo -s 
eqbal@ubuntu:~/apps/current$ ulimit -n 100000
eqbal@ubuntu:~/apps/current$ exit
exit
eqbal@ubuntu:~/apps/current$ ulimit -n
1024
eqbal@ubuntu:~/apps/current$ ulimit -n 100000
-bash: ulimit: open files: cannot modify limit: Operation not permitted
eqbal@ubuntu:~/apps/current$ sudo ulimit -n 100000
sudo: ulimit: command not found
eqbal@ubuntu:~/apps/current$ sudo -s 
eqbal@ubuntu:~/apps/current$ ulimit -n
1024
eqbal@ubuntu:~/apps/current$ ulimit -n 100000
eqbal@ubuntu:~/apps/current$ ulimit 
unlimited



eqbal@ubuntu:~/apps/current$ cat /proc/sys/fs/file-max 
1620791
eqbal@ubuntu:~/apps/current$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 128164
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 100000
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 128164
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
eqbal@ubuntu:~/apps/current$ whoami 
root
eqbal@ubuntu:~/apps/current$ exit
exit
eqbal@ubuntu:~/apps/current$ whoami 
eqbal
eqbal@ubuntu:~/apps/current$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 128164
max locked memory       (kbytes, -l) 64
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) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 128164
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited