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Tenex C Shell (tcsh)
Great, enhanced, but completely compatible version of the Berkeley UNIX C shell (csh). It is a command language interpreter usable both as an interactive login shell and a shell script command processor which uses C-like syntax. It's what I use by default.
Public Domain Korn Shell (pdksh)
A clone of the AT&T Korn shell. At present, it has most of the ksh88 features, some (not many) of the ksh93 features, and a number of its own features.
The Z Shell (zsh)
Powerful, full-featured, Bourne-compatible, interactive shell and script command processor.
"If you can't get a compliment any other way, pay yourself one."
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"Two things are infinite: the universe and human stupidity; and I'm not so sure about the universe."
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"The only lasting trauma is the one we suffer without positive change."
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