Welcome to decuser's blog
Topics on this blog include computing, retro-computing, operating systems, math, and whatever other technical subjects I happen to be exploring that I find interesting enough to take and share notes about.
Posts
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unix freebsd
How to Monitor Battery Life and Sleep on FreeBSD 12.1
A non-ui method for monitoring battery life and sleep on FreeBSD. This is useful for when you just want to run the command line or a lightweight window manager like TWM, FVWM, etc. Installs as a service and will sleep the machine as the battery approaches it's lowpoint of charge.
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unix
Restoring Grub - dual boot FreeBSD and Linux
Note describing how to restore the grub bootloader after it is catastrophically removed. Please note that it may be specific to my setup:
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unix freebsd
How to set up tor on FreeBSD 11.2
A note describing how to install and set up the tor browser on freebsd 11.2
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unix linux mint
Linux Mint Note
A note with fixes for issues arising with the use of linux mint.
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unix linux centos
Installing Centos 5.11 with-2.6.17.8 kernel
A note describing the process of installing Centos 5.11 with the 2.6.17.8 kernel in order to be able to work along with Kroah-Hartman's 2007 book, Linux Kernel in a Nutshell, in the modern era.
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unix linux centos
Installing Centos 5.11 with 2.6.18-kernel
A note describing the process of installing Centos 5.11 with 2.6.18-kernel in order to be able to work along with Kroah-Hartman's 2007 book, Linux Kernel in a Nutshell, in the modern era.
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unix linux centos
Installing Centos 4.8 with 2.6.11 Kernel
A note describing the process of installing Centos 4.8 with 2.6.11 Kernel in order to be able to work along with Bovet & Cesati's 2006 book, Understanding the Linux Kernel, 3rd. ed., in the modern era.
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unix linux centos
Installing Centos 6.9 with 2.6.34 Kernel
A note describing the process of installing Centos 6.9 with 2.6.34 Kernel in order to be able to work along with Robert Love's 2010 book, Linux Kernel Development, 3rd. ed., in the modern era.
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math algebra
Algebra of sets
A note about the algebra of sets. This note informs [Boolean Algebra Notes (Jan 4, 2018)]({% post_url 2018-01-04-boolean-algebra-notes %}). The algebra of sets is a somewhat intuitive boolean algebra and it was the study of the algebra of sets that helped me better understand boolean algebra. I was introduced to the idea in NAVEDTRA, but this development is based solely on Whitesitt (1961).
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math algebra boolean
Boolean Algebra Notes
This set of notes is a synthesis of many sources. I was having a very difficult time understanding some of the simplifications that were being done in videos and texts on digital logic, so I dug a little deeper until I had enough of a grasp to appreciate the elegance of the boolean logic system.