/bin/sh is mostly intended for scripts, less so as an interactive user shell. It needs to be small, fast and as bugfree as possible, as opposed to offering a pl

/bin/sh is mostly intended for scripts, less so as an interactive user shell. It needs to be small, fast and as bugfree as possible, as opposed to offering a plethora of user interactive features. That's why FreeBSD uses sh and debian uses dash for this purpose.