Sandra Henry-Stocker

Unix Dweeb

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Sandra Henry-Stocker has been administering Unix systems for more than 30 years. She describes herself as "USL" (Unix as a second language) but remembers enough English to write books and buy groceries. She lives in the mountains in Virginia where, when not working with or writing about Unix, she's chasing the bears away from her bird feeders.

The opinions expressed in this blog are those of Sandra Henry-Stocker and do not necessarily represent those of IDG Communications, Inc., its parent, subsidiary or affiliated companies.

Managing and monitoring swap space on Linux

Sleeping and waiting on Linux

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

Using the Linux set command

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

Linux turns 30

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

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

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

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 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

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

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

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

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.

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