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.
Extracting substrings on Linux
Linux provides a nice selection of commands for pulling substrings from text, but each has its own way of working.
Running a Linux terminal in your Windows browser
Here's an introduction to running a Linux terminal inside a browser and some of the tools available to you.
Using strace and ltrace to help with troubleshooting on Linux
strace and ltrace provide a flood of information about system and library calls being made by Linux processes, and sorting through it all can help discover the cause of problems.
How to cheat on Wordle using Linux
Figuring out Wordle can be a lot of fun, but if it gets too frustrating, this Linux bash script can be your friend. Enjoy taking a look at how the cheating process works.
Using whereis, whatis, and which to find out about commands on Linux
The whereis, whatis and which commands can provide information on Linux commands, but in spite of names that appear related, they provide very different answers.
Creating a quick calculation function on Linux
Need to perform a long series of calculations? Let's look at a cool trick for making it easier.
Demystifying &&, ||, and ! on Linux
&&, || and ! operators can run tests and take actions based on the test results, but they can be a little tricky until you understand the logic.
2 ways to remove duplicate lines from Linux files
Linux awk and uniq commands offer options for cutting out duplicate lines from Linux files.
Using the btrfsck file-checing command on Linux
The btrsfck command allows you to check the integrity of a btrfs file system. As file systems migrate to this newer file system format, this command is increasingly important.
Using the ldd command on Linux
The ldd displays the shared object files that a particular Linux command needs to run.
Using fail2ban on Fedora
Fail2ban can detect attempts to connect to authenticated services such as ssh and put the offending connections in "jail". This article provides information on how to install, configure and test the tool on Fedora.