How to change Open file limit ( ulimit -n ) on ubuntu 18.04

How to change Open file limit ( ulimit -n ) on ubuntu 18.04

So, let’s start the article for How to change Open file limit ( ulimit -n ) on ubuntu 18.04

Prerequisites
– Ubuntu 18.04 with SSH access.

Update your package for Ubuntu.

sudo apt-get update

sudo nano /etc/sysctl.conf

put this end of file

 fs.file-max = 65535 

after that change, we need to change in one more file.

 sudo nano /etc/security/limits.conf 

at end of file add these lines. Please replace UBUNTU with your server username. we are using AWS so by default username UBUNTU.

root soft nproc 65535
root hard nproc 65535
root soft nofile 65535
root hard nofile 65535

ubuntu soft nproc 65535
ubuntu hard nproc 65535
ubuntu soft nofile 65535
ubuntu hard nofile 65535

After saving both files please restart apache2.

For testing/checking please log out from your SSH and log in.

then just check using this command.

 ulimit -n 

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