Tags: SysAdmin

How to List Repositories on Linux

A Linux repository is a storage location from which your system retrieves and installs OS updates and applications. Each repository is a collection of software hosted on a remote server and intended to be used for installing and updating software packages on Linux systems. When you run commands...
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Working with Linux File Links

In this article by Oliver Pelz, the author of Fundamentals of Linux, you’ll take a look at what Linux file links are and how to work with them. Connecting a filename to the actual data is managed by the filesystem using a table or data structure, which is called a title allocation table. In the...
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Why the Future of Data Storage is (Still) Magnetic Tape

Studies show [PDF] that the amount of data being recorded is increasing at 30 to 40 percent per year. At the same time, the capacity of modern hard drives, which are used to store most of this, is increasing at less than half that rate. Fortunately, much of this information doesn’t need to be...
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Examining Partitions on Linux Systems

Linux systems provide many ways to look at disk partitions. Here's a look at commands you can use to display useful information -- each providing a different format and with a different focus. Linux systems provide many ways to look at disk partitions. In this post, we'll look at a series of...
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2 Ways to Re-Run Last Executed Commands in Linux

One of the greatest features of Bash is the command history, which stores all commands a user runs, in a history file within his/her home directory (typically /home/$USER/.bash_history). This allows the user to easily recall, edit and rerun previous commands. In this article, we will demonstrate...
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5 Things You Should Be Monitoring

Whether you're a developer building websites or internal applications, or an administrator building the infrastructure to back them, your job doesn't stop once they're up and running. Machine failure, releases containing bugs, and growth in usage can all lead to problems that need to be dealt with...
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netplan
Netplan is a command line utility for the configuration of networking on certain Linux distributions; Jack shows how to use it.

How to Use the Netplan Network Configuration Tool on Linux

For years Linux admins and users have configured their network interfaces in the same way. For instance, if you’re an Ubuntu user, you could either configure the network connection via the desktop GUI or from within the /etc/network/interfaces file. The configuration was incredibly easy and never...
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5 Tips to Improve Productivity with zsh

The Z shell known as zsh is a shell for Linux/Unix-like operating systems. It has similarities to other shells in the sh (Bourne shell) family, such as as bash and ksh, but it provides many advanced features and powerful command line editing options, such as enhanced Tab completion. It would be...
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MySQL High Availability at GitHub

GitHub uses MySQL as its main datastore for all things non-git, and its availability is critical to GitHub’s operation. The site itself, GitHub’s API, authentication and more, all require database access. We run multiple MySQL clusters serving our different services and tasks. Our clusters use...
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How to See What's Going On With Your Linux System Right Now

Is that service still running? What application is using that TCP port? These questions and more can be answered easily by sysadmins who know simple Linux commands. If you're a system administrator responsible for Linux servers, it's essential that you master the Bash shell, especially the...
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