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Guide: Install and Use Docker on Ubuntu 20.04

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Install and Use Docker Ubuntu

This is an express tutorial on getting Docker up and running on Ubuntu 20.04 – Fast! Docker is a virtualization platform that has exploded in popularity due to its ease of use and low resource overheads. It is used to run applications inside containers, making them portable and easy to install – all of their dependencies and configuration can be kept separate even though they are being run on the same host – reducing the time it takes to configure your system and making sure applications … Read more

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How to Set Up Nginx HTTPs Reverse Proxy on Ubuntu

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Set Up Nginx HTTPs Reverse Proxy on Ubuntu

This tutorial explains how to set up Nginx as an HTTPS reverse proxy on Linux Ubuntu, What is Nginx? Nginx is a popular web server, reverse proxy, load balancing, mail proxy, and HTTP caching software package which can be run on the Linux Operating System. It’s a very flexible web server and proxy solution and is an alternative to the Apache HTTP Server. What is a Proxy Server A proxy server acts as a relay between a client and a server at the client’s request. … Read more

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Best Media Server Software for Linux [2021]

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Best Media Server Software for Linux

Find the best media server software for Linux in 2021 with a built-in web client, native client, support for multiple formats, and more. Home media servers have become increasingly popular and there are a number of commercial and free options. Media servers are also a popular project for people tinkering with Raspberry Pi’s, can be a cool introductory project for people getting started in Linux and networking, or can just be a good way to put an old computer to use. Home media servers can … Read more

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Quickly and Easily Outlining Text in GIMP 2 [3 Easy Steps]

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outline text in gimp 2

Here’s a quick 3-step method for outlining text in GIMP 2. GIMP is the most popular photo manipulation and image editing package for Linux. Many tutorials go through a long-winded process of converting the text to paths and expanding selections, but in the end, if you want quick results, this is the method to use. Step 1: Write some text using the text tool Click on the text tool in the toolbox, and write some text to outline. Step 2: Select the Text by Colour … Read more

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How to Search in Vim Text Editor

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How to Search in Vim

This article explains how to search for words and expressions using Vim. Vim is ubiquitous, some tips and tricks can help you in everyday work life. So! Let’s explore simple searching, with Vim. Find a string Starting in normal mode, press forward-slash (/). Type in the string you’re looking for, and press enter. Press n to find the next occurrence. Once you reach the bottom, Vim loops back to the top. Reverse Search If you want to find all previous occurrences of a word, use … Read more

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Vim: How to Find and Replace

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vim find and replace

This tutorial explains how to find and replace words in Vim/Vi. Vim provides the substitute command, similar to sed, for replacing text. Let’s go through and look at your options for finding and replacing text in this popular Linux text editor. Vim Syntax #from :help substitute :[range][substitute]/[pattern/{string}/[flags][count] For each line in [range] replace a match of {pattern} with {string}. For the {pattern} see pattern “:help pattern”. For instance if you wanted to replace all instances of Nov & Dec with Jan. :%s/Nov\|Dec/Jan/G When [range] and … Read more

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Vim / Vi: Deleting lines

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Vim / Vi: Deleting lines

This tutorial will teach you how to delete single, blank, or multiple lines in Vim / Vi by using a pattern or range. Vim is ubiquitous, and it’s everywhere. Learning how to edit, remove, yank, paste, and everything else can help you speed through tasks. Before we get started, let’s turn on line numbers: Press ESC (pressing escape brings you into normal mode) Type :set number (brings you into command mode) Line numbers, voila! Simple Deletion The two basic usages of the d-shortcut, delete a single … Read more

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How to Save a File and Quit in Vim/Vi

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How to Save a File and Quit in Vim Vi

In this guide, we explain how to save a file and quit/exit in Vim, how to save a file without exiting, and how to quit/exit without saving. Vim (Vi IMproved) is an open-source text editor for Unix or Linux. It’s used to write and edit text, either in the command line interface or independently through a GUI. It’s a great tool and like any software tool, one of the first things to learn about it is how to safely exit without losing all of your … Read more

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Track file changes using auditd

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command line

Most of Linux distributions comes with Linux Auditing System that makes it possible to track file changes, file accesses as well as system calls. It’s pretty useful functionality for sysadmins who wish to know who and when accessed and/or changed sensitive files like /etc/passwd, /etc/sudoers or others. Daemon auditd that usually runs in background and starts after reboot by default logs those events into /var/log/audit.log file (or into other file if different syslog facility is specified). The common usage is to list all files which should … Read more

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Limit CPU usage of Linux process

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CPU not matter anymore

cpulimit is a small program written in C that allows to limit CPU usage by Linux process. Limit is specified in percentage so it’s possible to prevent high CPU load generated by scripts, programs or processes. I found cpulimit pretty useful for the scripts running from cron, for example I can do overnight backups and be sure that compression of 50GB file via gzip won’t eat all CPU resources and all other system processes will have enough CPU time. In most of Linux distributions cpulimit … Read more