zfsbootmenu

A lot of what's in the Pure Bash Bible is horrifically slow. Many of those things are substantially faster, even when paying the cost of starting a new process, when you use an external and commonly available tool. I wrote a bash performance profiler that outputs data in a format that flamegraph.pl recognizes - it really helped identify where we could improve the performance of ZFSBootMenu. https://github.com/zbm-dev/zfsbootmenu/releases/tag/v1.12.0 Don't fall in the trap of thinking things have to be written entirely in bash; it's okay to use other tools to help fill in the gaps.

Does Arch Linux have boot environments (or equivalent)? Boot Environments allows the system to be upgraded, while preserving the old system environment in a separate ZFS dataset. * https://man.freebsd.org/cgi/man.cgi?beadm The beadm command is the user interface for managing ZFS Boot Environments (BEs). This utility is intended to be used by system administrators who want to manage multiple Oracle Solaris instances on a single system. * https://docs.oracle.com/cd/E86824_01/html/E54764/beadm-1m.ht... > A ZFS boot environment is a bootable clone of the datasets needed to boot the operating system. Creating a BE before performing an upgrade provides a low-cost safeguard: if there is a problem with the update, the system can be rebooted back to the point in time before the upgrade. * https://klarasystems.com/articles/m

I'm continuing to work on https://github.com/zbm-dev/zfsbootmenu . Support for Debian's initramfs-tools, more install guides for distributions, better documentation.