Linux 101: How to copy files and directories from the command line

Jack Wallen continues his Linux 101 series, with an introduction on how to copy files and directories from the command line.

Are you new to Linux? If so, you’ve probably found the command line can be a bit intimidating. Don’t worry–it is for everyone at the beginning. That’s why I’m here to guide you through the process, and today I’m going to show you how to copy files and folders from the command line. 

Why would you need to copy files and folders this way? You might find yourself on a GUI-less Linux server and need to make a backup of a configuration file or copy a data directory. 

Trust me, at some point you’re going to need to be able to do this. Let’s find out how. 

SEE: Linux: The 7 best distributions for new users (free PDF) (TechRepublic)

First we’ll copy a file. Let’s say you’re about to

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Best sleep gadgets of 2021: Drift away with smart sleeping masks, white noise machines, and more

Humans spend about one-third of their lives asleep–or at least we are supposed to. These sleep gadgets are designed to help people drift to sleep, stay asleep, and wake refreshed.

Humans spend approximately one-third of their lives asleep. It should really come as no surprise that the market for assistive sleep aids is a multi-billion dollar industry. There are myriad devices designed to help people slowly drift to sleep at the end of the day and wake feeling rested and refreshed. From smart sleep masks and white noise machines to devices engineered to optimize pillow and bed temperature, here are six of the best sleep gadgets of 2021.





Image: Eight Sleep

Preferred bed temperature will vary from person-to-person and it can be difficult to maintain this ideal coolness or warmth seasonally. This product uses a two-part system (a bed cover and a control hub) to control the temperature of

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These virtual robot arms get smarter by training each other

A virtual robot arm has learned to solve a wide range of different puzzles—stacking blocks, setting the table, arranging chess pieces—without having to be retrained for each task. It did this by playing against a second robot arm that was trained to give it harder and harder challenges.

Self play: Developed by researchers at OpenAI, the identical robot arms—Alice and Bob—learn by playing a game against each other in a simulation, without human input. The robots use reinforcement learning, a technique in which AIs are trained by trial and error what actions to take in different situations to achieve certain goals. The game involves moving objects around on a virtual tabletop. By arranging objects in specific ways, Alice tries to set puzzles that are hard for Bob to solve. Bob tries to solve Alice’s puzzles. As they learn, Alice sets more complex puzzles and Bob gets better at

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