CSH is the default shell for root user on FreeBSD system. Basic usage is pretty much the same as any other shell like bash, zsh, fish or whatever. Until you try to execute some bash specific for loops, or attempt to use Delete key. Whaaaat? - Yes, apparently delete doesn’t give the correct character in csh and just prints ~. I don’t know if that’s xterm (or xterm compatible) terminal thing or just a csh thing but it doesn’t matter.

Here’s how to solve it:

  1. Open up ~/.cshrc in your favorite text editor

  2. Within your prompt section (if ($?prompt) then) add following block (or fill in the needed bindkey if you already have that section):

           if ( $?tcsh ) then
               bindkey "\e[3~" delete-char
       endif

  3. Save the file and run: source ~/.cshrc

Voila, it should work!