NetBSD's ash (Almquist sh) for Linux is a small (62K--no job control)
Bourne-compatible shell. It is great for machines with low memory, but
does not provide all the extras of shells like bash, tcsh, and zsh.
Most shell scripts are compatible with bash. Note that most scripts
written for Linux use some bash-specific syntax. The Slackware setup
scripts are a notable exception, because ash is the shell used during
installation.