Tags: UNIX

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scp tutorial
This tutorial shows how to use scp (secure copy command), which encrypts transferred files.

How to Securely Transfer Files Between Servers with scp

If you run a live or home server, moving files between local machines or two remote machines is a basic requirement. There are many ways to achieve that. In this article, we talk about scp (secure copy command) that encrypts the transferred file and password so no one can snoop. With scp you don’t...
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regex search
Regular expressions are a powerful tool for pattern matching and searching that every sys admin should know.

An Introduction to Regular Expressions for New Linux Users

Regular expressions are a powerful means for pattern matching and string parsing that can be applied in so many instances. With this incredible tool you can: Validate text input Search (and replace) text within a file Batch rename files Undertake incredibly powerful searches for files...
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Optimizing Graphics Memory Bandwidth with Compression and Tiling: Notes on DRM Format Modifiers

Written by Varad Gautam, Consultant Associate Software Engineer at Collabora. Over the past few weeks, I have been working for Collabora on plumbing DRM format modifier support across a number of components in the graphics stack. This post documents the work and the related consequences/...
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Understanding the Difference Between sudo and su

In one of our earlier articles, we discussed the 'sudo' command in detail. Towards the ends of that tutorial, there was a mention of another similar command 'su' in a small note.  In this article, we will discuss in detail the 'su' command as well as how it differs from the 'sudo' command. The main...
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5 Highly Promising Terminal Emulators

The terminal emulator is a venerable but essential tool for computer users. The reason why Linux offers so much power is due to the command line. The Linux shell can do so much, and this power can be accessed on the desktop by using a terminal emulator. There are so many available for Linux that...
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grep tutorial
The grep command is a very powerful way to find documents on your computer. Learn how to use it in this tutorial.

Finding Interesting Documents with grep

The grep command is a very powerful way to find documents on your computer. You can use grep to see if a file contains a word or use one of many forms of regular expression to search for a pattern instead. Grep can check the file that you specify or can search an entire tree of your filesystem...
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‘You are Not Expected to Understand This’: An Explainer on Unix’s Most Notorious Code Comment

The phrase “You are Not Expected to Understand This” is probably the most famous comment in the history of Unix. And last month, at the Systems We Love conference in San Francisco, systems researcher Arun Thomas explained to an audience exactly what it was that they weren’t supposed to understand....
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7 Awesome Open Source Web Performance Software For Linux

Web performance is nothing but the speed in which web pages are downloaded and displayed on the user’s web browser. Faster website speeds have been shown to increase sales or increase visitor loyalty including user satisfaction. Particularly useful for those use slow internet connections or on...
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How Fast Are Unix Domain Sockets?

It probably happened more than once, when you ask your team about how a reverse proxy should talk to the application backend server. “Unix sockets. They are faster.”, they’ll say. But how much faster this communication will be? And why a Unix domain socket is faster than an IP socket when multiple...
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Merry Linux to You!

Get ready to start caroling around the office with these Linux-centric lyrics to popular Christmas carols. Running Merrily on Open Source To the tune of: Chestnuts Roasting on an Open Fire Running merrily on open source With users happy as can be We're using Linux and getting lots done And happy...
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