Unix as a Second Language
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.
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.
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.
Commands to find Linux-package updates
Here are easy ways to list upgrades available for installed packages on Fedora, Ubuntu and related Linux systems.
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
Installing fonts on your Linux system
If you've never looked into the availability of free fonts for Linux, you've got a big surprise coming. There are many thousands of uniquely appealing fonts, and adding them to your system is very easy.
Backing up not just your data, but your productivity
When we run into a serious problem that threatens our ability to get our work done, it just might be time to rethink what "backing up" should involve.
How to dig up configuration details on your Linux system with getconf
It's not hard to look up configuration details on your Linux system. The hard thing is wrapping your brain around how many are available and what they can tell you.
Peering into binary files on Linux
Here are eight Linux commands for looking into binary files and viewing details about what executables are doing when they run.
Checking Linux system performance with sar
The sar command can provide detailed system metrics on just about every aspect of system performance. You can query it on as as-needed basis or set it up to provide daily reports.
Rescuing a Linux system from near disaster
When a Linux user finds his system nearly out of disk space and unwilling to save files, fellow Linux users online provide a solution.
What you can find out asking which, whereis and whatis in Linux
The where, whereis and whatis commands summarize commands, show where executables are, and point to relevant man pages.
Troubleshooting your bash scripts
Bash provides some handy techniques for troubleshooting bash scripts, and they're very easy to use.
Viewing compressed file content on Linux without uncompressing
You can examine the contents of compressed files on Linux systems without uncompressing the files or changing them in any way. This post explains the commands for doing that and the types of compressed files they work with.
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