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Watching activity on Linux with watch and tail commands

The watch and tail commands can help monitor activity on Linux systems. This post looks at some helpful ways to use these commands.

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Converting between uppercase and lowercase on the Linux command line

Converting text between uppercase and lowercase can be very tedious, especially when you want to avoid inadvertent misspellings. Fortunately, Linux provides a handful of commands that can make the job very easy.

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How to find what you’re looking for on Linux with find

The find command has a huge array of options to help you locate exactly the files you're looking for on a Linux system. This post explores a series of extremely useful commands.

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Digging up IP addresses with the Linux dig command

The dig command is extremely versatile both for retrieving information from domain name servers and for troubleshooting.

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Navigating man pages in Linux

The man pages on a Linux system can do more than provide information on particular commands. They can help discover commands you didn't realize were available.

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Intro to the Linux command line

Here are some warm-up exercises for anyone just starting to use the Linux command line. Warning: It can be addictive.

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Showing memory usage in Linux by process and user

There are several commands for checking up on memory usage in a Linux system, and here are some of the better ones.

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Setting up passwordless Linux logins using public/private keys

Using a set of public/private keys to allow you to log into a remote Linux system or run commands using ssh without a password can be very convenient, but setup is just tad tricky. Here's how and a script to help.

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Locking and unlocking accounts on Linux systems

There are times when locking a Linux user account is necessary and times when you need to reverse that action. Here are commands for managing account access and what's behind them.

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How AppArmor can protect your Linux system

AppArmor is a Linux-kernel security module that offers unique benefits.

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Generating numeric sequences with the Linux seq command

The Linux seq command can generate lists of numbers and at lightning speed. It's easy to use and flexible, too.

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Unix is turning 50. What does that mean?

Unix time, also known as 'epoch time,' is the number of seconds that have passed since Jan 1, 1970. As Unix turns 50, let's take a look at what worries kernel developers.

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How to tell if you’re using a bash builtin in Linux

A built-in is a Linux command that's part of whatever shell you're using. Can you tell what commands are built-ins and which are not?

How to use the Linux uniq command

The uniq command in Linux is valuable for finding out who’s logged into a server

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7 ways to remember Linux commands

Linux commands run from the nearly obvious to the very complicated, but there are many ways that you can easily remember and use even the most obscure commands.

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Breaking Linux files into pieces with the split command

Some simple Linux commands allow you to break files into pieces and reassemble them as needed. In this post, we'll look at the split command and some of its more useful options.

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Counting down the days in Linux using bash

Need to know how many days there are before some important event? Let bash and the date command help with that!

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Displaying dates and times your way in Linux

The Linux date command provides more options for displaying dates and times than you can shake a stick at (without hurting your wrist anyway). Here are some of the more useful choices.

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The many faces of awk

The awk command provides a lot more than simply selecting fields from input strings, including pulling out columns of data, printing simple text evaluating content – even doing math.

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How to use the bmon command: 2-Minute Linux Tips

In this Linux tip, learn how to use the bmon command. It’s a graphical tool for looking at network bandwidth.

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