Ash (Almquist Shell) Variants

a year ago

Ash (Almquist Shell) variants and their development history.
Original release by Kenneth Almquist in 1989 as a replacement for the System V Release 4 Bourne shell.
Key differences between Ash and SVR4 shell, including command substitution and export syntax.
Evolution through traditional BSD releases (4.3BSD-Net/2 to 4.4BSD-Lite2).
386BSD and BSD/OS (BSDi) variants and their specific changes.
NetBSD and FreeBSD developments, including POSIX compliance and feature additions.
Early Linux port of Ash and its adoption in distributions like Slackware and Debian.
Dash (Debian Almquist Shell) as a POSIX-compliant, slim implementation derived from NetBSD.
Slackware's variant of Ash based on Debian's Ash with specific patches.
Android's use of an Ash variant derived from NetBSD, later replaced by mksh.
Cygwin's transition from Ash to Bash and then to Dash.
BusyBox's incorporation of Ash with modifications for size and compatibility.
Minix's adoption and modifications of Ash.

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