zsh src daf5ad588f6a3c882dec06e1663fd5c6c2108780b279b414273eb4fba69aea4d A shell designed for interactive use The zsh is a shell designed for interactive use, and it is also a powerful scripting language. Many of the useful features of bash, ksh, and tcsh were incorporated into zsh. It can match files by file extension without running an external program, share command history with any shell, and more. http://zsh.sourceforge.net