Let’s have a look at a really simple to use firewall, the UFW firewall. As a system administrator, it is our duty to make sure that the systems we work on are secured from attackers. There are multiple methods to incorporate in terms of network security but the most fundamental one begins with a firewall. […]
How To Set Up And Configure UFW Firewall in Ubuntu/Debian Read More »
The hosts’ file is an extremely useful albeit small text file that stores host names with associated IP addresses. It is basically a mapping from hostnames to IP addresses. Any network protocol uses this mapping to convert hostnames to numeric IP addresses. The mapping is because the Network Layer does not work with the hostnames.
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CouchDB is a free and open-source fault-tolerant database made and maintained by the Apache Software Foundation. It is a very good choice for a NoSQL type database, where you do not want a relational database. In this tutorial, we shall see how to configure and install the latest version of CouchDB from the Command-Line. Step
How to install CouchDB on Ubuntu 18.04 Read More »
A DNS cache (sometimes called a DNS resolver cache) is a temporary database, maintained by a computer’s operating system, that contains records of all the recent visits and attempted visits to websites and other internet domains. You may want to sometimes clear your DNS Cache, especially if you give access permission to another person, or
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In this tutorial, we’ll learn how to set environment variables in Linux manually. When using Linux, the Kernel sets up the environment with default values for a lot of variables that we would need to use. This includes the default paths, languages, default shell, home directory, and more. Let’s go over how and where Linux
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Tired of using the same old default hostname that comes with your Ubuntu 18.04 server, and want to change it? And you want to do it now, without having to restart? Oh yes, you can do both!! Let us see how to change the hostname of our Ubuntu server. It’s just a few simple steps.
How to Change the Hostname of Ubuntu 18.04 Server Read More »
The kill command in Linux is used to send a signal to a process or a group of processes. The name, unfortunately, chosen as kill, instead of signal, does not need to necessarily kill a process. As we will see, based on the values passed to it, it sends an appropriate signal to the Process
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The alias command in Linux is used to make a shortcut or an alternative name for an existing command. So instead of re-typing the same commands with all the options over and over again, you can create a shorthand for the same and make it simpler to use in the future. How to use the
The alias Command in Linux Read More »
We recently learned about the cat and the more commands in Linux. In this tutorial, we’ll be covering the head command which is pretty similar to the cat command in the essence that it helps you list down the contents of a file in the terminal. The head command has very few options, making this
The head Command in Linux Read More »
The mv command in Linux allows you to move a file from one location to another. Also, we don’t really have a rename command in Linux. Instead, we move files from one name to another. This is facilitated by the “mv” command which stands for move. For basic usage, you will find it very straightforward
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