Dash

dash is the Debian Almquist shell: Article description::a small, fast, and POSIX compliant [[shell.]] It is well-suited for startup scripts, and used on Debian (and derivative distributions) as replacement. As some shell scripts may have bashisms in them, it is not guaranteed to work out-of-the-box on Gentoo as replacement.

See the terminal emulator article for some general usage pointers, though dash is not often used in interactive mode.

Configuration
Make dash the default system shell:

Use dash as current shell:

Garbled display
The output of a shell can, in some conditions, become corrupt. See the terminal emulator article for instructions to help fix this.