How to use Network Time Security on your system

But what is Network Time Security (NTS)? To understand NTS, first we have to get familiar with NTP. NTP, Network Time Protocol is a networking protocol for clock synchronization. In simple terms this protocol helps your system to get correct time. RFC 5905 lays the ground rule for NTP. Now,…

Dgplug summer training, 2022

dgplug summer training 2022 will start at 13:00 UTC, 25th July. This is our 15th edition. Following our tradition, we have updated and modified our training based on the feedback from the old participants and community at large. There shall be more experiments for the betterment during this year’…

Update on foss.training infrastructure

This summer we are having 15th edition of Dgplug summer training. July, 2022 is when the training begins. It was a long due task on me to revamp the infrastructure. Website update Our foss.training website is now all ready with it’s new avatar, a hearty gratitude to Saptak…

Different VirtualHost entries for IPv4 and IPv6 in apache

The VirtualHost directive in Apache configuration enables us to run multiple websites on a single server. I wanted to have two different VirtualHost entries for the same domain on different IPv4 and IPv6 addresses. I am using adas.example.org as the domain name in the example mentioned here. <…

Finding and installing the security updates on Ubuntu

Keeping the system updated is a daily task of sys admins. To find out the available security updates on a Ubuntu machine use the commands here under. I have done this on a virtual machine Ubuntu 21.04. apt update This will update all the package information for the Debian…

Upgrade CentOS 7 to CentOS 8 inplace

I wanted to upgrade one of my servers from CentOS 7 to CentOS 8. The following are the steps I followed : Check the kernel version Before we start the upgrade process, let us see the kernel version. # uname -a Linux centostest 3.10.0-1127.el7.x86_64 #1 SMP Tue…