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.
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.
Su Mo Tu We Th Fr Sa
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