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Keeping track of Linux users: When do they log in and for how long?

Getting an idea how often your users are logging in and how much time they spend on a Linux server is pretty easy with a couple commands and maybe a script or two.

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

Learn how to use the groups command. It provides a list of the groups that a user is a member of by pulling information from the /etc/group and /etc/passwd files.

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How to manipulate PDFs on Linux

The pdftk command for Linux systems provides many options for working with PDFs, including merging pages, encrypting files, applying watermarks, compressing files, and even repairing PDFs.

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How to manage logs in Linux

Log files on Linux systems contain a LOT of information — more than you'll ever have time to view. Here are some tips on how you can make use of it without ... drowning in it.

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Getting help for Linux shell built-ins

Linux built-ins are commands that are part of a user’s shell. Sandra Henry-Stocker explains how to recognize them and get help on their use.

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Mastering user groups on Linux

Managing user groups on Linux systems is easy, but the commands can be more flexible than you might be aware.

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How to use the setfactl and getfactl commands: 2-Minute Linux Tips

In this Linux tip, learn how to use the setfacl and getfacl commands. They allow you to establish and report on file permissions that reach beyond the traditional read, write and execute permissions on Linux systems.

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

In this Linux tip, learn the command that reverses text – the rev (reverse) command. At first glance, this command may not seem helpful. But, there are times that it can be quite useful.

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Will rolling into IBM be the end of Red Hat?

IBM's acquisition of Red Hat is a big deal -- a $34 billion big deal -- and many Linux professionals wonder how it's going to change Red Hat's role in the Linux world. Here are some thoughts.

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Linux a key player in the edge computing revolution

Edge computing is augmenting the role that Linux plays in our day-to-day lives. A conversation with Jaromir Coufal from Red Hat helps to define what the edge has become.

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How basic file permissions work: 2-Minute Linux Tips

In this Linux Tip, learn how to read and understand basic file permissions. Once you understand file permissions, you can analyze and reassign them.

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

In this Linux Tip, learn how to use the awk command. You can use it to select one or more pieces of text from lines of input.

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Undo releases Live Recorder 5.0 for Linux debugging

Debugging on multi-process systems just got significantly easier with the release of Live Recorder 5.0 from Undo.

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Tracking down library injections on Linux

Library injections are less common on Linux than they are on Windows, but they're still a problem. Here's a look at how they work and how to identify them.

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

In this Linux tip, Sandra will show you how to use the stat command. It provides a lot of the same information as ls -l, but in a very different format. It also includes some useful additional information.

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Exploring /run on Linux

There's been a small but significant change in how Linux systems work with respect to runtime data. Here's an overview of the change to /run.

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How to use /dev/null: 2-Minute Linux Tips

In this Linux tip, learn how to use the /dev/null tool. You can send your outputs to /dev/null and it simply disappears. This is helpful when a command’s output isn’t interesting and you don't need to see it.

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How to send email from the Linux command line

Linux offers several commands that allow you to send email from the command line. Here's look at some that offer interesting options.

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