Jon Jensen

I live in Provo, Utah and work at End Point Dev on various Internet-related projects: web applications, databases, e-commerce, scalability, system administration, and security, and occasionally, Android app development. I’m a radio amateur (“ham”) with call sign KG7TXN.

I write on the End Point blog and Somusing, blog of my wife, Erin.

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

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encrypt messages to me using PGP/GnuPG with my current public keys (2019 ed25519 ECC key, 2012 4096-bit RSA key), which superseded my historical keys (1998 DSA key, 1994 RSA key).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

A commercial, and in some respects a social, doubt has been started within
the last year or two, whether or not it is right to discuss so openly the
security or insecurity of locks. Many well-meaning persons suppose that
the discussion respecting the means for baffling the supposed safety
of locks offers a premium for dishonesty, by showing others how to be
dishonest. This is a fallacy. Rogues are very keen in their profession,
and already know much more than we can teach them respecting their several
kinds of roguery. Rogues knew a good deal about lockpicking long before
locksmiths discussed it among themselves, as they have lately done. If
a lock — let it have been made in whatever country, or by whatever
maker — is not so inviolable as it has hitherto been deemed to be,
surely it is in the interest of honest persons to know this fact,
because the dishonest are tolerably certain to be the first to apply
the knowledge practically; and the spread of knowledge is necessary to
give fair play to those who might suffer by ignorance. It cannot be too
earnestly urged, that an acquaintance with real facts will, in the end,
be better for all parties.

—Charles Tomlinson’s Rudimentary Treatise on the Construction of Locks,
published around 1850

quotation #229 of collection of 823 · another random quotation

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.

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!

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.