Unix as a Second Language
Using whois/jwhois on Linux
The whois and jwhois command can retrieve extensive details on domain registrations including domain registrants, domain status, responsible organizations and their locations.
Use dmseg to check your Linux system's kernel message buffer
While the dmesg command can display the entire contents of the Linux kernel message buffer there are ways to have it choose just what you want to see.
Shortcuts for adding multiple lines of text to files on Linux
It's easy to add a few lines of text to files on Linux, but there are tools that make it easier to add many lines.
Using the script command on Linux to record command line activity
The script command not only makes a record of what commands you run but also allows you to save the output generated so that you can examine it later or easily turn your command sequences into scripts.
Monitoring Linux system resources with bpytop
The bpytop tool works a lot like other performance monitoring tools, but gives you tremendous control over what it shows you.
Using chpasswd to change account passwords on Linux
The chpasswd command allows Linux admins to change passwords one at a time or many at a time. Here's what you need to watch out for.
Using the cheat command on Fedora Linux
The cheat command, available for installation on many Linux systems, provides an easy way to make cheat sheets available for hundreds of commands.
Searching through compressed files on Linux
There are a number of ways to search the contents of compressed files while leaving the files intact. This post examines how to view, browse and search through many types pf compressed files.
Using the xargs command on Linux to simplify your work
The xargs command can come in very handy, especially when combined with find. Understanding how it works and how to implement a loop can help make it work for you.
Windows Subsystem for Linux is ready for Windows 11
Windows users can now more easily explore Linux on their Windows 11 desktops.
Installing packages on Linux and Mac with Homebrew
Here's an introduction to Homebrew, an easy but unusual package manager that works with both Linux and macOS.
Fedora Linux declared a 'digital public good'
Fedora has been recognized as a "digital public good" by an international organization focused on promoting a more equitable world.
Looking at your Linux system's network interface with ethtool
The ethtool utility provides information about your network-driver and interface-card settings, including speed, whether the interface uses auto-negotiation, and whether it runs in half- or full-duplex mode.
Managing and monitoring swap space on Linux
Swap space can play an important role in system performance. Learn how to determine how much swap space your system has available and how much it's being used.
Sleeping and waiting on Linux
The sleep and wait commands can provide useful ways to observe system and script activity.
Using the Linux set command
The Linux set command offers a lot of interesting options for working with your scripts.
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.
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.
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.
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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