B.2. tcsh versus csh

The TC shell (tcsh) is an enhanced version of the Berkeley C shell (csh). Listed here are some of the new features.

• An enhanced history mechanism

• A built-in command line editor (emacs or vi) for editing the command line

• Formatting the prompts

• A spelling correction facility and special prompts for spelling correction and looping

• Enhanced and programmed word completion for completing commands, filenames, variables, user names, etc.

• Ability to create and modify key bindings

• Automatic, periodic, and timed events (scheduled events, special aliases, automatic logout, terminal locking, etc.)

• New built-in commands (hup, ls –F, newgrp, printenv, which, where, etc.)

• New built-in variables (gid, loginsh, oid, shlvl, tty, uid, version, HOST, REMOTEHOST, VENDOR, OSTYPE, MACHTYPE)

• Read-only variables

• Better bug reporting facility