Tags: Tutorial

How to Use the gpg Command to Encrypt Linux Files

There are many reasons to encrypt files — even on a system that is well maintained and comparatively secure. The files may highly sensitive, contain personal information that you don't want to share with anyone, or be backed up to some variety of online storage where you'd prefer it be extra secure...
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timer
Learn how to create a timer that will start your game server with systemd.

Setting Up a Timer with systemd in Linux

Previously, we saw how to enable and disable systemd services by hand, at boot time and on power down, when a certain device is activated, and when something changes in the filesystem. Timers add yet another way of starting services, based on... well, time. Although similar to cron jobs, systemd...
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Persistent Volumes for Docker Containers

Docker guarantees the same environment on all target systems: If the Docker container runs for the author, it also runs for the user and can even be preconfigured accordingly. Although Docker containers seem like a better alternative to the package management of current distributions (i.e., RPM and...
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Linux history Command Tutorial for Beginners (8 Examples)

If your work involves running tools and scripts on the Linux command line, I am sure there are a lot of commands you would be running each day. Those new to the command line should know there exists a tool - dubbed history - that gives you a list of commands you've executed earlier. In this...
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Using Git
Jack Wallen walks you through the basics of getting Git up and running and using it with GitHub.

An Introduction to Using Git

If you’re a developer, then you know your way around development tools. You’ve spent years studying one or more programming languages and have perfected your skills. You can develop with GUI tools or from the command line. On your own, nothing can stop you. You code as if your mind and your fingers...
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log files
When a problem arises on your system, the first thing to do is to view the logs. Jack Wallen shows how.

Viewing Linux Logs from the Command Line

Learn how to easily check Linux logs in this article from our archives. At some point in your career as a Linux administrator, you are going to have to view log files. After all, they are there for one very important reason...to help you troubleshoot an issue. In fact, every seasoned administrator...
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user groups
We continue our tour of Linux with this tutorial on creating and managing users and groups.

Users, Groups and Other Linux Beasts: Part 2

In this ongoing tour of Linux, we’ve looked at how to manipulate folders/directories, and now we’re continuing our discussion of permissions, users and groups, which are necessary to establish who can manipulate which files and directories. Last time, we showed how to create new users, and now we’...
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top
Checking system memory usage is a crucial skill for Linux admins; Jack looks at five different ways to approach the problem.

5 Commands for Checking Memory Usage in Linux

The Linux operating system includes a plethora of tools, all of which are ready to help you administer your systems. From simple file and directory tools to very complex security commands, there’s not much you can’t do on Linux. And, although regular desktop users may not need to become familiar...
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Kate text editor
Kate is a user-friendly text editor with some powerful features.

Advanced Search and Replace with the Kate Text Editor

Learn how to use the Kate text editor in this tutorial from our archives. The powerhouse Kate text editor has advanced search-and-replace, including support for escape sequences and regular expressions, so you can make complex corrections without leaving your document. The Kate text editor is my...
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stop processes
Linux has all the tools you need to stop running processes at the command line. Jack Wallen has details.

How to Kill a Process from the Command Line

Learn how to kill errant processes in this tutorial from our archives. Picture this: You’ve launched an application (be it from your favorite desktop menu or from the command line) and you start using that launched app, only to have it lock up on you, stop performing, or unexpectedly die. You try...
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