etsh: etsh (extended Thompson shell) etsh: etsh: Etsh(1) is an enhanced, backward-compatible port of the Sixth etsh: Edition Thompson shell. Tsh(1) is an unenhanced port of the shell. etsh: etsh: The original Thompson shell was principally written by Ken Thompson etsh: of Bell Labs. etsh: etsh: etsh was formerly known as "osh". etsh: etsh: