Sonim XP 3.20-e Quest - To perform a proper "factory reset" on this phone (or probably any Philips Xenium 9@9q based phone) enter #20070101# in the dialer and press the green dial button. I am telling you this only because this information is otherwise impossible to find online.
Computering
If you enable Secure Boot (sometimes referred to as part of Shielded VM) in Google's GCP Compute Instance VMs you get Linux kernel lockdown too:
root@instance-1:/home/michael_hotplate_co_nz# dmesg | grep -i lock
[ 0.000000] Kernel is locked down from EFI secure boot; see https://wiki.debian.org/SecureBoot
In a July 2020 update to bsdmainutils, Debian patched out the ability for cal(1) to highlight the current day in the calendar output, but didn't update the manual page to reflect this. If you're using Debian and you want cal to still highlight the day you can work around this for now by adding alias cal="ncal -b" to your ~/.bashrc or similar shell startup script.
March 2023
Su Mo Tu We Th Fr Sa
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31
Tracking down "unauthorised content" errors on SSL pages (2011) - A tip for a simple and comprehensive way to work out what content in a web page isn't using https URIs when the page itself is served over https. Help avoid scary warnings for your users.
QuickPage patch (2011) - A quick and dirty patch to the QuickPage daemon to allow it to bind to specific addresses at startup. Bonus Debian init script.
Arpitrary (2010) - Automated arbitrary ARP spoofing daemon. A stand-in for "arpcatch" if
you
need one in a pinch.