dash is the Debian Almquist shell: a small, fast, and POSIX compliant shell. It is well-suited for startup scripts, and used on Debian (and derivative distributions) as /bin/sh replacement. As some shell scripts may have bashisms in them, it is not guaranteed to work out-of-the-box on Gentoo as /bin/sh replacement.
USE flags for app-shells/dash Debian Almquist Shell
emerge --ask app-shells/dash
Make dash the default system shell:
ln -sf dash sh
echo /bin/dash >>/etc/shells
usermod -s /bin/dash root
Use dash as current shell:
chsh -s /bin/dash
- Shell — a command-line interpreter that offers a text-based interface to users.