Max Number of ulimit open file and Increase max number of ulimit open file in Linux

Increase max number of ulimit open file in Linux
1- Step : open the sysctl.conf and add this line fs.file-max = 65536
# vi /etc/sysctl.conf add end of line
        fs.file-max = 65536
save and exit.
2. Step : vi /etc/security/limits.conf and add below the mentioned
    * soft nproc 65535
    * hard nproc 65535
    * soft nofile 65535
    * hard nofile 65535
save and exit check max open file ulimit

[root@localhost# 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) 127358
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 65535
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) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
 
Increase max user processes in Linux
Follow the step:
vi /etc/security/limits.conf and add below the mentioned
* soft nproc 65535
* hard nproc 65535
* soft nofile 65535
* hard nofile 65535
and vi /etc/security/limits.d/90-nproc.conf
* soft nproc 65535
* hard nproc 65535
* soft nofile 65535
* hard nofile 65535
save and exit check the user max processes ulimit
[root@localhost# 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) 127358
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 65535
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) 65535
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited