shellsthat
Shellsthat is a term used in computing to describe the family of interactive command-line environments, or shells, that interpret user input and execute programs. While not widely recognized as a formal term, shellsthat is sometimes used in discussions to refer to the broad class of shells and their capabilities, including scripting constructs, interactive features, and portability concerns.
Prominent examples include Bourne-compatible shells such as sh, Bash, and Dash; C-like shells such as csh and
Design goals: POSIX compliance (POSIX sh) for portability; interactive enhancements like spell-correcting, auto-suggestions, programmable completion, globbing,
Usage and compatibility: scripts written for one shell may fail on another if they rely on non-POSIX
Evolution: Since the 1980s, shells have evolved from simple command interpreters to rich environments capable of