Sandra Henry-Stocker
Unix Dweeb
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Opinions expressed by ICN authors are their own.
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.
Setting up passwordless Linux logins using public/private keys
Using a set of public/private keys to allow you to log into a remote Linux system or run commands using ssh without a password can be very convenient, but setup is just tad tricky. Here's how and a script to help.
Locking and unlocking accounts on Linux systems
There are times when locking a Linux user account is necessary and times when you need to reverse that action. Here are commands for managing account access and what's behind them.
Generating numeric sequences with the Linux seq command
The Linux seq command can generate lists of numbers and at lightning speed. It's easy to use and flexible, too.
Unix is turning 50. What does that mean?
Unix time, also known as 'epoch time,' is the number of seconds that have passed since Jan 1, 1970. As Unix turns 50, let's take a look at what worries kernel developers.
How to tell if you’re using a bash builtin in Linux
A built-in is a Linux command that's part of whatever shell you're using. Can you tell what commands are built-ins and which are not?
7 ways to remember Linux commands
Linux commands run from the nearly obvious to the very complicated, but there are many ways that you can easily remember and use even the most obscure commands.
Breaking Linux files into pieces with the split command
Some simple Linux commands allow you to break files into pieces and reassemble them as needed. In this post, we'll look at the split command and some of its more useful options.
Counting down the days in Linux using bash
Need to know how many days there are before some important event? Let bash and the date command help with that!
Displaying dates and times your way in Linux
The Linux date command provides more options for displaying dates and times than you can shake a stick at (without hurting your wrist anyway). Here are some of the more useful choices.
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.
Cleaning up with apt-get
Most of us with Debian-based systems use apt-get routinely to install packages and upgrades, but how often do we pull out the cleaning tools? Let's check out some of the tool's options for cleaning up after itself.
Red Hat Responds to Zombieload v2
Red Hat calls for updating Linux software to address Intel processor flaws that can lead to data-theft exploits
Red Hat announces RHEL 8.1 with predictable release cadence
Red Hat has just released Red Hat Enterprise Linux 8.1, first to follow the predictable release cadence promised at Red Hat Summit 2019
Looping your way through bash
There are many ways to loop through data in a bash script and on the command line. Which way is best depends on what you're trying to do.
Viewing network bandwidth usage with bmon
Introducing bmon, a monitoring and debugging tool that captures network statistics and makes them easily digestible.
Using multitail on Linux
Multitail allows you to watch multiple files as they are being updated -- like a split-window tail -f display. Let's check out how you can use it to monitor system activity and your files.
Linux sudo flaw can lead to unauthorized privileges
Exploiting a newly discovered sudo flaw in Linux can enable certain users with to run commands as root despite restrictions against it.
Viewing files and processes as trees on Linux
A look at three Linux commands - ps, pstree and tree - for viewing files and processes in a tree-like format.
How the Linux screen tool can save your tasks – and your sanity – if SSH is interrupted
The Linux screen command can be a life-saver when you need to ensure long-running tasks don't get killed when an SSH session is interrupted. Here's how to use it.
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