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.

Manipulating text with awk, gawk and sed

Using Linux hexedit and xxd commands to  view and modify binary files

Using Linux hexedit and xxd commands to view and modify binary files

The hexedit command provides a way to edit binary files, but to view and save the content in a file for later analysis without editing, try the xxd command.

Working with image files on the Linux command line

Working with image files on the Linux command line

There's a lot to learn about image files on the command line, from verifying file format to finding out where and when photos were taken and maybe even getting an unusual view of what they look like.

Commands and settings for managing user accounts on Linux

Commands and settings for managing user accounts on Linux

To manage user accounts on Linux systems, you'll need to be familiar with some important files and commands.

Linux files: creating, listing, updating, and more

Linux files: creating, listing, updating, and more

Linux provides a number of handy commands for managing file permissions, understanding who has access to the files and checking on file content.

Using the Linux locale command

Using the Linux locale command

The locale settings on Linux systems can sync dates and times with where you are in the world.

Creating and removing directory structures on Linux

Creating and removing directory structures on Linux

A few clever Linux commands can make it a lot easier to create, view and remove complex directory structures.

Using the ss command on Linux to view details on sockets

Using the ss command on Linux to view details on sockets

The ss command on Linux systems can provide extensive details on the sockets that provide communications between systems. This article describes ss and some of the many options available to you.

7 ways to look at network connections on Linux

7 ways to look at network connections on Linux

Linux provides a number of commands for examining network connections and sometimes creates new ones to expand functionality.

Converting numbers on Linux among decimal, hexadecimal, octal, and binary

Converting numbers on Linux among decimal, hexadecimal, octal, and binary

Linux provides commands for converting numbers from one base to another. Learn how to uses these commands and how to make the process easier with scripts and aliases.

Linux bash tips: Many ways to loop using bash

Linux bash tips: Many ways to loop using bash

There are many ways to loop through data on Linux using bash and many ways to generate the data to be looped through.

Commands for finding out if compressed Linux files are the same

Commands for finding out if compressed Linux files are the same

The zdiff and zcmp commands can see if Linux files differ and if so, how.

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