Find hardware version of Raspberry Pi from the command line

 

See instructions here: https://elinux.org/RPi_HardwareHistory#Which_Pi_have_I_got.3F

Run

cat /proc/cpuinfo

look for revision and look it up on above page

! or 

cat /proc/cpuinfo | grep 'Revision' | awk '{print $3}' | sed 's/^1000//'

! web version - not always accurate/updated though and not well documented

rev=$(awk '/^Revision/ { print $3 }' /proc/cpuinfo) && curl -L perturb.org/rpi?rev=$rev

Windows Server Activation

Several Windows Server 2019 installs wouldn’t let me activate them normally. To do it, launch an elevated command prompt and use this command - 

cscript c:\windows\system32\slmgr.vbs /ipk <product-key>