Changing the Hostname on Ubuntu Server

Before we configure Postfix MTA, let’s adjust our hostname to reflect the correct domain name in our outgoing internal email.

Setting up a hostname is really important if you’re using a custom domain for emailing. The hostname helps in proper mailing address.

One of the easiest and reliable solutions that I recommend is using G Suite to have a business email address, for example: team@restorebin.com. You can also get a 20% discount on sign up using this G Suite coupon code.

About Hostname, you can check your current hostname using the below command line in SSH:

hostname -f

The hostname command can also be used for changing the Ubuntu Server hostname throughout.

hostname example.com

I will be changing the hostname to demo.restorebin.com using below command. Continue reading →

Start by updating your system packages to the latest version:

sudo apt update
sudo apt -y upgrade

Reboot system after doing an upgrade

sudo reboot

Once the system is up, begin the installation FreeRADIUS and Daloradius on your Ubuntu 18.04 / Ubuntu 16.04 system.

Step 1: Install Apache Web Server and PHP

Daloradius will require php and Apache web server to be installed on the host system.

Installing Apache on Ubuntu:

Install Apache web server by running: Continue reading →

The cp command is a Linux command for copying files and directories. The syntax is as follows:

cp source destination
cp dir1 dir2
cp -option  source destination
cp -option1 -option2  source destination

Linux cp command examples

Continue reading →

Remember that you can check your current UFW ruleset with sudo ufw status or sudo ufw status verbose.

Block an IP Address

To block all network connections that originate from a specific IP address, 15.15.15.51 for example, run this command:

• sudo ufw deny from 15.15.15.51

Continue reading →