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On the LPIC-1 Exam 102: User Interfaces and Desktops
This is a riveting series: On the LPIC-1 Exam 102: Shells and Shell Scripting On the LPIC-1 Exam 102: User Interfaces and Desktops On the LPIC-1 Exam 102: Administrative Tasks On the LPIC-1 Exam 102: Essential System Services On the LPIC-1 Exam 102: Netwo…
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On the LPIC-1 Exam 102: Shells and Shell Scripting
This is a riveting series: On the LPIC-1 Exam 102: Shells and Shell Scripting On the LPIC-1 Exam 102: User Interfaces and Desktops On the LPIC-1 Exam 102: Administrative Tasks On the LPIC-1 Exam 102: Essential System Services On the LPIC-1 Exam 102: Netwo…
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On the LPIC-1 Exam 101: Devices, Linux Filesystems, FHS
This is a riveting series: On the LPIC-1 Exam 101: System Architecture On the LPIC-1 Exam 101: Linux Installation and Package Management On the LPIC-1 Exam 101: GNU and Unix Commands On the LPIC-1 Exam 101: Devices, Linux Filesystems, FHS When studying for
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On the LPIC-1 Exam 101: GNU and Unix Commands
This is a riveting series: On the LPIC-1 Exam 101: System Architecture On the LPIC-1 Exam 101: Linux Installation and Package Management On the LPIC-1 Exam 101: GNU and Unix Commands On the LPIC-1 Exam 101: Devices, Linux Filesystems, FHS When studying for
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On the LPIC-1 Exam 101: Linux Installation and Package Management
This is a riveting series: On the LPIC-1 Exam 101: System Architecture On the LPIC-1 Exam 101: Linux Installation and Package Management On the LPIC-1 Exam 101: GNU and Unix Commands On the LPIC-1 Exam 101: Devices, Linux Filesystems, FHS When studying for
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On the LPIC-1 Exam 101: System Architecture
This is a riveting series: On the LPIC-1 Exam 101: System Architecture On the LPIC-1 Exam 101: Linux Installation and Package Management On the LPIC-1 Exam 101: GNU and Unix Commands On the LPIC-1 Exam 101: Devices, Linux Filesystems, FHS When studying for
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On VBoxManage
For whatever reason, I’ve never thought to interact with VirtualBox using its command line tool, VBoxManage.
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On xrandr
You don’t need a big bloated GUI desktop environment to manage your displays.
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On DevOps Is Really A Drag, Man
True terror is to wake up one morning and discover that your high school class is running the country.
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On Unsharing Namespaces, Part Two
“There is no such thing as a Docker container!”
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On Interviewing Tools, Redux
“I was looking for a job and then I found a job.
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On Thumb Rules
I’ve been thinking back on my career in the biz and many of the beliefs that have guided me (sometimes without knowing it).
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On Scale Buddy
What the … ?
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On Hard and Soft Links
We use hard links all the time.
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On the picoCTF Transformation Challenge
I recently started playing capture the flag and, goddamn, it is a lot of fun!
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On Opaque Data Types in C
The Big Intro Compiling One Big Program Breaking It Apart The Interface The Library The User Program Low-hanging Fruit Remove Private Functions from the Interface Creating a typedef Creating the Opaque Data Type Summary References The Big Intro Opaque data
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On Recovering Deleted Files with `lsof`
The title of this article is a bit disingenuous, a bit of a liar, because the truth is that you can only restore a deleted file if another running process is still currently using it.
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On memfd_create
memfd_create is a Linux-specific system call that first made its appearance in the Linux 3.17 kernel (glibc support was added in version 2.27).
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On System Calls
System Calls Making the Call Privilege Context Switch Library Wrapper Functions Emulation strace Misc Examples Summary References System Calls System calls, commonly just called syscalls, are the way that a user space process interfaces with the kernel.
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On Testing Website Links
In revisiting some of my older posts, I noticed that some of the links were broken.
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On Unsharing Namespaces, Part One
“A container is just a process.” – Attributed to Titus Herminius Aquilinus, c. 500 B.C.E.
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On Getting Started with Go
Installing Go Managing Multiple Installations Go Environment Variables Enabling Dependency Tracking Managing Dependencies Adding Dependencies Removing Dependencies Listing Dependencies Verifying Dependencies Tidying Dependencies Inspecting The Dependency…
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On DevOps?
Q.
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On Recovering Files and Persistent Flash Drives
Last Friday, I found myself in quite an annoying pickle.
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On eBPF
Berkeley Packet Filter, known today by the name BPF, is an old technology that has been extended to achieve magic, as many of its supporters will unequivocally state.
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On Soothing the Savage Breast
The title of this article references the original text by its author William Congreve.
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On Git Large File Storage
I’m not sure how it happened, but I’ve gone all this time without knowing about Git Large File Storage (LFS).
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On Running systemd-nspawn Containers
I’d like to talk more about a container technology that I really like that I touched upon in a previous article: systemd-nspawn. systemd-nspawn is a container manager that allows you to run a full operating system or a command in a directory tree.
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On Software Engineers
I was walking some dogs the other day when I ran into a couple that lives down the street.
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On runc
This article intends to introduce runc as a tool that ultimately creates and runs containers at a lower level than container engine tools like podman and docker, which most developers are familiar with and use.
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On Let's Encrypt and Multiple Domains
Previously, we’ve seen how to get a wildly popular and disruptive Italian dictionary website back online.
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On Birthdays
This year I’m due for another birthday.
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On Right?
Right?
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On the Provenance of Installed Software
When I’m working on an assignment, I do my best not to sully my work laptop with whatever trendy and/or bloated software the client is using by isolating their environment from mine using virtual environments and containers.
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On BINFMT_MISC
Perusing Jessie Frazelle’s awesome blog the other night, I came across an older article called Nerd Sniped by BINFMT_MISC that piqued my interest.
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On Hating Agile's Guts
This post assumes that the reader is familiar with Agile.
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On Tailing the History
I was watching a demo the other week, and the presenter was tailing his .bash_history file in real time to log all the commands he was inputting into another session.
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On Git Blobs
There are four types of objects in Git, the stupid content tracker: blobs commits trees annotated tags Today, children, we’re going to take a look at only Git blob objects.
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On i3 Cheatsheet
General Movements Workspaces Windows Scratchpad Conclusion References My i3 config file resides in $HOME/.config/i3/.
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On Vim and `filetype` Plugins
When writing my recent article On Viewing Documentation in Vim, I found an article that referenced how to cleanup and organize Vim configuration when there are too many autocommand (autocmd) commands (commands that are executed automatically for matching…
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On Viewing Documentation in Vim
I just discovered something delightful.
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On Realizing You've Made a Huge Mistake
I’ve worked for several large companies, and with the exception of one, I’ve hated them all.
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On Authentication Issues
I ran into an issue the other day with my an authentication key, and it wasn’t the first time.
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On Reconnecting
Today, I got rid of my mobile flip phone, and it easily become one of the best decisions I’ve ever made.
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On Applying a Macro from the CLI in Vim
Tonight I found an interesting solution to a problem where I needed to do some text manipulation on a string.
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On Changing the Time Zone
With any luck, this will be one of my shortest posts.
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On Running a Tor Onion Service in a Chroot
This article originally appeared on April 6, 2018.
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On fallocate
The fallocate tool is quite nifty and is used to preallocate or deallocate space to a file.
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On YubiKey and OTP
A one-time password (OTP) is a password that is only valid once.
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On Creating an Empty File
Here’s a bit of fun.