increase-max-no-of-open-files-ubuntu-16.md

Increase permanently max number of open files limit in Ubuntu 16.04

Increase the available limit (system-wide limit)

$ sudo vim /etc/sysctl.conf

Add the following line to file

fs.file-max = 2097152

Run this to increase total number of files that can remain open system-wide

$ sudo sysctl -p

Edit the following file (per-user limit)

$ sudo vim /etc/security/limits.conf

Add following lines to file

* soft nofile 600000
* hard nofile 600000
root soft nofile 600000
root hard nofile 600000

Edit the following file

$ sudo vim /etc/pam.d/common-session

Add this line to it

session required pam_limits.so

Logout and login

Check new limits

Hard limit ulimit -Hn
Soft limit ulimit -Sn
Max limit cat /proc/sys/fs/file-max