Some basics on Linux Software RAID. There are good references on the same in the same wiki.
This article provides the steps to boot to single user mode and reset the root password.
A short description of how to enable root login over SSH in Linux.
A simple article on how to load 100% CPU load in Linux.
First step is to identify the number of cores.
Run the command “yes > /dev/null &” for N times. N denotes the number of processors identified via “cat /proc/cpuinfo” command. 2N is one better number.
MOK Architecture. The keys added via mokutil via any Linux OS, will be stored in the MOK database. Since its a boot service variable, it will be stored in the BIOS NVRAM. On next boot the shim layer will prompt for enrolling the key. Once enrolled the key can be used to validate the respective async drivers (not part of OS distribution) by kernel to allow installing them during OS boot or run time.
Nice high level article on swap files. How to find the allocated swap file size, location, allocate new swap file for increasing or decreasing the swap file size, adjust the swappiness and remove a swap file.
Linux 5.14 updates
removed the old IDE support.
Support for Rust programming language
mainline support for Raspbery pi 400