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.

Linux dominates supercomputing

Digging for DNS answers on Linux

Digging for DNS answers on Linux

Dig is a powerful and flexible tool for interrogating domain name system (DNS) servers. In this post, we’ll take a deep dive into how it works and what it can tell you.

Summarizing your command usage on Linux

Summarizing your command usage on Linux

With a modest string of commands, you can get a quick look at what commands you're using on your Linux system and how often.

Some easy choices for encrypting files on Linux

Some easy choices for encrypting files on Linux

A lot of encryption tools are available for Linux systems. In this post, we look at some easy-to-use commands and a script for making the process even easier.

How to decipher Linux release info

How to decipher Linux release info

Displaying and interpreting information about Linux releases is a bit more complicated than it might seem.

Painless file extraction on Linux

Painless file extraction on Linux

Extracting files from archives isn't difficult, but it can be tedious, especially with all the archive naming conventions in use today. But you can make the task a little easier by putting everything you know about the process into a...

How to stress test your Linux system

How to stress test your Linux system

Stressing your Linux servers can be a good idea if you'd like to see how well they function when they're loaded down. In this post, we'll look at some tools that can help you add stress and gauge the results.

How to assess user activity in Linux

How to assess user activity in Linux

In this post, we look at commands that Linux server admins can use to view user activity

How to loop forever in bash on Linux

How to loop forever in bash on Linux

Looping forever on the command line or in a bash script is easy. Coming up with the reasons why you want to interrupt an infinite loop and how you want to do that requires a little more effort.

5 ways to examine the content of files on Linux

5 ways to examine the content of files on Linux

How to use the cat, more, head and tail commands to look at the content of Linux files, not just text files.

How to find and remove broken symlinks on Linux

How to find and remove broken symlinks on Linux

A symlink or "symbolic link" is a Linux file that simply points at another file. If the referenced file is removed, the symlink will remain but not indicate there's a problem until you try to use it. Here are some easy ways to find...

How to use tmux to create a multi-pane Linux terminal window

How to use tmux to create a multi-pane Linux terminal window

tmux is a terminal multiplexer – a tool that allows you to open multiple panes in a single terminal window and run separate commands in each of them. This post provides an introduction to tmux including how to navigate between the...

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