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The postfix mail server is an open-source MTA (mail transfer agent). Postfix routes e-mails to the desired mail server. It was originally released in 1998 and still active in 2019. It is also known as VMailer or IBM secure mail. If you don’t want to use mail servers like G-mail and want to convert your Ubuntu machine into a mail server then you are at the right place.

By default Ubuntu has a built-in firewall known as UFW(uncomplicated firewall). For inexperienced users, It it difficult to use iptables in order to properly configure a firewall. UFW makes the configuration of a firewall very easy since it is a simple interface for the standard iptables in Ubuntu. Although it does not offer the powerful features of iptables, UFW allows to carry out basic firewalls tasks via its simple-to-use graphical interface.

Most of us have installed tens of applications in our machines. As time goes on, many files will get bigger and bigger and your disk space will start to shrink. It is therefore important to know the files or directories that are eating up your machine disk space. In this article, you will learn different methods to find out the largest files in your system.

A WiFi connection is a common issue that can be either a software or a hardware issue. In Ubuntu, the NetworkManager makes the connection to wifi without you having to perform any manual task. At times however unexpected things might occur and you will have to configure or adjust the connection settings by yourself.