May the source be with you, but remember the KISS principle ;-)
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(slightly skeptical) Educational society promoting "Back to basics" movement against IT overcomplexity and  bastardization of classic Unix

kernel boot parameter init=/bin/bash

kernel boot parameter init=/bin/bash

Re:  - Red Hat

boot - Linux Command - Unix Command

bash [Archive] -

The Linux Boot Process

boot(7) - Linux manual page

Linux Security- Securing and Hardening Linux Production Systems ...

Red Hat and Fedora startup scripts