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Bash-like Customizable Prompt in Korn Shell

Bash has built-in support for extensive PS1 prompt customization and as a result many people customize their shell prompts. There is no equivalent built-in support for PS1 customization in ksh93 but such support can easily be added using discipline functions.

RNG Protocol Error in Lenovo ThinkPad Firmware

This post discusses the UEFI 2.4 Random Number Generator protocol and Lenovo’s current implementation of the protocol and suggests there is an error in their implementation.