1

How can i configure csh or tcsh to show available choices by pressing Tab twice, just like bash?

2

If you look in the tcsh/csh man page you'll find a option under "completion":

set autolist

Add this to your .cshrc file to enable this feature.

A word on tcsh/csh

This shell really shouldn't be used, both are sub-par shells by today's standards and are wrought with poorly implemented features. You should be using Bash, Zsh, Ksh, or something else entirely.

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