Portrait photo of Jon Jensen

Jon C. Jensen

I live in Provo, Utah and work with Internet-related projects: web applications, databases, scalability, system administration, and security, and in the past, ecommerce and Android app development. I’m a radio amateur (“ham”) with call sign KG7TXN.

I sometimes write on Somusing, the blog of my wife, Erin, and wrote a lot on the End Point blog when I worked there.

Other places to find me on the web: LinkedIn Twitter Facebook Instagram

My email address is jon@swelter.net — since 1999! You may encrypt messages to me using PGP/GnuPG with my current public keys (2019 ed25519 ECC key, 2012 4096-bit RSA key), which superseded my historical keys (1998 DSA key, 1994 RSA key).

A quotation

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Would you want doctors? Yes, to set bones. We should want a good surgeon for that, or to cut off a limb. But do you want doctors? For not much of anything else, let me tell you, only the traditions of the people lead them to think so; and here is a growing evil in our midst. It will be so in a little time that not a woman in all Israel will dare to have a baby unless she can have a doctor by her. I will tell you what to do, you ladies, when you find you are going to have an increase, go off into some country where you cannot call for a doctor, and see if you can keep it. I guess you will have it, and I guess it will be all right, too. Now the cry is, “Send for a doctor.” If you have a pain in the head, “Send for a doctor;” if your heel aches, “I want a doctor;” “my back aches, and I want a doctor.” The study and practice of anatomy and surgery are very good; they are mechanical, and are frequently needed. Do you not think it is necessary to give medicine sometimes? Yes, but I would rather have a wife of mine that knows what medicine to give me when I am sick, than all the professional doctors in the world. Now let me tell you about doctoring, because I am acquainted with it, and know just exactly what constitutes a good doctor in physic. It is that man or woman who, by revelation, or we may call it intuitive inspiration, is capable of administering medicine to assist the human system when it is besieged by the enemy called Disease; but if they have not that manifestation, they had better let the sick person alone. I will tell you why: I can see the faces of this congregation, but I do not see two alike; and if I could look into your nervous systems and behold the operations of disease, from the crowns of your heads to the soles of your feet, I should behold the same difference that I see in your physiognomy—there would be no two precisely alike. Doctors make experiments, and if they find a medicine that will have the desired effect on one person, they set it down that it is good for everybody, but it is not so, for upon the second person that medicine is administered to, seemingly with the same disease, it might produce death. If you do not know this, you have not had the experience that I have. I say that unless a man or woman who administers medicine to assist the human system to overcome disease, understands, and has that intuitive knowledge, by the Spirit, that such an article is good for that individual at that very time, they had better let him alone. Let the sick do without eating, take a little of something to cleanse the stomach, bowels and blood, and wait patiently, and let Nature have time to gain the advantage over the disease. Suppose, for illustration, we draw a line through this congregation, and place those on this side where they cannot get a doctor, without it is a surgeon, for thirty or fifty years to come; and put the other side in a country full of doctors, and they think they ought to have them, and this side of the house that has no doctor will be able to buy the inheritance of those who have doctors, and overrun them, outreach them, and buy them up, and finally obliterate them, and they will be lost in the masses of those who have no doctors. I know what some say when they look at such things, but that is the fact. Ladies and gentlemen, you may take any country in the world, I do not care where you go, and if they do not employ doctors, you will find they will beat communities that employ them, all the time. Who is the real doctor? That man who knows by the Spirit of revelation what ails an individual, and by the same Spirit knows what medicine to administer. That is the real doctor, the others are quacks.

—Brigham Young, October 9, 1872, Journal of Discourses, 15:225–226

Travel notes

A map of the route my son & I took on our 2019 trip to Armenia, Georgia, Ukraine, and Moldova: Jon and Seth itinerary in June 2019.

An interactive map of various churches we visited in north England in 2013, with links to our blog posts and photos about each: Churches in north England, 2013.

Work talks

Presentation slides from talks I have given at technical conferences and company-wide meetings are available.

Free software

I support free software and open source. Don’t be a sharecropper!

I am on GitHub as jonjensen and have contributed to projects including PostgreSQL, Interchange, DevCamps, and Bucardo. I also keep old miscellaneous scripts around.

Other free software I work most often with: awesome, alacritty, kitty, tmux, Screen, zsh, bash, Firefox, Chromium, Vim, Git, Rust, Go, Perl, Python, Ruby, PHP, PostgreSQL, Linux (mostly Red Hat/CentOS, Fedora, Ubuntu, Debian), Android, OpenBSD, OpenSSH, Apache httpd, nginx, Postfix, Dovecot, Pine (now Alpine), Signal, GnuPG, Standard Notes, Zulip, MediaWiki, VLC, rsync, ripgrep, mtr, and Nmap, just as a sampling. Thanks to all free software developers for your time and efforts!

Once upon a time I created some RPM packages of free software for use on Fedora Linux. The source RPMs may still prove useful for building on a newer version.

Human languages

Some Unicode things I keep handy:

Language family maps for reference:

My novice linguistics research: I wrote a paper for Linguistics 490 (senior seminar) taught by John Robertson, winter semester 1998 at Brigham Young University. It examines how Hebrew verb patterns (binyanim) may be semantically grouped using C.S. Peirce’s universal categories. The paper: Hebrew Verb Pattern Tendencies Clarified by Peirce’s Universal Categories (8.5″ x 11″). Reference chart: Roots in various binyanim chart (11″ x 17″).

Writing

Some of my free verse:

Many years ago, a tree fell on our car, so I wrote up the story to share.

Good causes

A few organizations I support:

Religion

Links about religion:

Johann Sebastian Bach composed some of my favorite music. See these freely redistributable Bach sheet music PDFs and the James Kibbie complete Bach organ works recordings. Mutopia collects freely usable music scores. Thanks to those who typeset the music and gave it away!

Hymns:

Liberty

Miscellany

mod.zayda.net is a collection of old Amiga-era music “modules”, including the whole U4ia and F8 collection by Jim Young, mostly created on his Amiga.

End communication.