on OpenBSD, specifically

Commands cheatsheet

ksh

yeah there is no !!. Use the fc command. By default it will run ed.

ifconfig

hostname.if(5) are /etc/hostname.[if] files

for iwn0, start with several "join (essid) wpakey (psk)", ending with "inet autoconf"

for wg0: wgpeer (pub) wgendpoint (host) (port) wgaip (allowed range) wgaip (allowed range) wgpka (persistent keepalive seconds) wgkey (priv) [repeat line for many peers]
inet (ipv4)
inet6 (ipv6)

doas sh /etc/netstart iwn0
but it's only ifconfig commands being ran so maybe don't go for that

See also wireguard on openbsd

misc

• https://dataswamp.org/~solene/2022-04-21-openbsd-71-fan-noise-temperature.html
• there's fswatch https://emcrisostomo.github.io/fswatch/
• also this basic `entr` https://github.com/eradman/entr

OpenBSD used to have systrace until 6.0 (5.9)

https://bsd.slashdot.org/story/02/10/17/2347226/openbsd-gains-privilege-elevation

https://www.informit.com/articles/article.aspx?p=363731

https://man.openbsd.org/OpenBSD-5.9/systrace

https://man.openbsd.org/OpenBSD-4.0/systrace.4

https://daemonforums.org/showthread.php?t=9795 - removed in 6.0

Stuff on rc.d

https://www.bsdfrog.org/pub/events/openbsd-rcd-AsiaBSDCon2016-paper.pdf

https://www.bsdfrog.org/pub/events/openbsd-rcd-AsiaBSDCon2016.pdf

https://www.oreilly.com/library/view/absolute-openbsd-2nd/9781457172496/packages_and_rc_d_scripts.html

https://ircnow.org/kb/doku.php?id=openbsd:rc.d

compare https://docs.freebsd.org/en/articles/rc-scripting/

https://support.hashicorp.com/hc/en-us/articles/360001964767-OpenBSD-rc-Script-Example