Zsh is a UNIX command interpreter (shell) usable as an
interactive login shell and as a shell script command
processor. Of the standard shells, zsh most closely resembles
ksh but includes many enhancements. Zsh has command-line editing,
built-in spelling correction, programmable command completion,
shell functions (with autoloading), a history mechanism, and a
host of other features.
THE Z SHELL (ZSH)
This is version 4.3.10 of the shell. This is a development release,
but is believed to be reasonably stable. Sites where the users need to
edit command lines with multibyte characters (in particular UTF-8)
will probably want to upgrade. The previous widely released version
of the shell was 4.3.9.
The Zftp directory contains a set of functions acting as a front end to the
zftp command, provided as an add-on module. They allow you to perform FTP
tasks from within the shell using as many of the shell's own facilities
as possible. For more information, see the zshzftpsys manual page.