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.

Tricks for getting around your Linux file system

Linux firewall basics with ufw

Linux firewall basics with ufw

We take a look at ufw - the uncomplicated firewall - on Linux, providing some insights and commands for making changes.

Manually rotating log files on Linux

Manually rotating log files on Linux

Linux system log files are by default set to rotate. Depending on the age or size, a sequence of files moves back a step, the oldest being removed and a new one taking over as the current log file. When needed, however, you can...

Viewing and configuring password aging on Linux

Viewing and configuring password aging on Linux

With proper settings, Linux users can be forced to periodically change their passwords. Here's how to view password aging settings and how to configure some of the settings.

Communicating with other users on the Linux command line

Communicating with other users on the Linux command line

Linux systems offer a number of easy commands for sending messages to other logged in users. In this post, we examine some very handy messaging tools.

Watching activity on Linux with watch and tail commands

Watching activity on Linux with watch and tail commands

The watch and tail commands can help monitor activity on Linux systems. This post looks at some helpful ways to use these commands.

Converting between uppercase and lowercase on the Linux command line

Converting between uppercase and lowercase on the Linux command line

Converting text between uppercase and lowercase can be very tedious, especially when you want to avoid inadvertent misspellings. Fortunately, Linux provides a handful of commands that can make the job very easy.

How to find what you’re looking for on Linux with find

How to find what you’re looking for on Linux with find

The find command has a huge array of options to help you locate exactly the files you're looking for on a Linux system. This post explores a series of extremely useful commands.

Digging up IP addresses with the Linux dig command

Digging up IP addresses with the Linux dig command

The dig command is extremely versatile both for retrieving information from domain name servers and for troubleshooting.

Navigating man pages in Linux

Navigating man pages in Linux

The man pages on a Linux system can do more than provide information on particular commands. They can help discover commands you didn't realize were available.

Intro to the Linux command line

Intro to the Linux command line

Here are some warm-up exercises for anyone just starting to use the Linux command line. Warning: It can be addictive.

Showing memory usage in Linux by process and user

Showing memory usage in Linux by process and user

There are several commands for checking up on memory usage in a Linux system, and here are some of the better ones.

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