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

In this Linux tip, learn how to use the export command. It's a bash built-in that allows command line variables to be available to a child process – a second shell or a script that you run.

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Sleeping and waiting on Linux

The sleep and wait commands can provide useful ways to observe system and script activity.

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Using the Linux set command

The Linux set command offers a lot of interesting options for working with your scripts.

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Linux turns 30

It's doubtful that even Linus Torvalds, the creator of the Linux kernel, imagined it would play such a major role in everything from supercomputers to tiny embedded devices.

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Choosing and changing your Linux shell

If you don't love the shell you're using on your Linux system, change it! There are plenty, including bash, fish, ksh, tcsh, zsh.

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How to use cksum and sha256sum command

In this Linux tip, you'll learn two checksum commands -- one that provides an easy way to compare a copy of a file to the original, and one that computes a 256-bit checksum that is cryptographically secure.

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How password hashing works on Linux

The /etc/shadow contains a lot more information than usernames and password hashes. It includes, among other things, the hashing algorithm that is used.

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How to do math on the command line using double parentheses: 2-Minute Linux Tips

In this Linux tip, learn an easy way to do math on the command line using double parentheses. This construct is often used in scripts, but also works just fine on the command line.

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Using the Linux cut command to grab portions of lines from files

The cut command offers many ways to extract portions of each line from a text file. It's similar to awk in some ways, but it has its own advantages and quirks.

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

In this Linux tip, learn how to use the shuf command -- short for “shuffle”. It randomly rearranges lines from a file or output that is sent to it.

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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 nl command: 2-Minute Linux Tips

In this Linux tip, learn how to use the nl command. It stands for “number lines” and it does just that.

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Viewing enabled and running services on Linux with systemctl

Systemd and the systemctl command play vital roles in most of today's Linux systems. This post explains commands for peering into some aspects of how they work.

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Feds' demand for software standards could boost enterprise security

An executive order issued in May by the Biden Administration has elevated the status of the software bill of materials, by mandating their use in federal government contracting.

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Commands to find Linux-package updates

Here are easy ways to list upgrades available for installed packages on Fedora, Ubuntu and related Linux systems.

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How to install Apache on Fedora: 2-Minute Linux Tips

In this Linux tip, learn how easy it is to install Apache on Fedora. The first thing you need to do is run a command to install the software. Then, you can run other commands to ensure it starts when your system reboots, to view...

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Find out what packages are installed on your Fedora system

The dnf command can uncover a wealth of information about what file packages are installed on Fedora and related systems

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How to ask a Linux command for help: 2-Minute Linux Tips

In this Linux tip, learn how to ask a Linux command for help. You can type the command you want to know about and then add --help. What the command should send back is an explanation of the command's options, maybe a usage example and...

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