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In response to #4, would have been a perfect time to bring up a Matrix screensaver.

Or "cat /dev/urandom | tr -dc 'A-F0-9 '"

A little better: echo -e '\E[32;40m'; cat /dev/urandom | tr -dc 'A-F0-9'

Less magic: tput setaf 2; tput setab 0; cat /dev/urandom | tr -dc 'A-F0-9'

Can you explain what that does?

tput setaf 2 -- queries the terminfo database for the proper escape sequence for setting the terminal foreground to color 2 (green) and echoes it, turning your foreground that color tput setaf 0 -- ditto, but for black background

tput setaf 2 makes your prompt green

tput setab 0 makes the prompt background black

The rest displays random letters A-F and numbers 0-9 on your terminal.

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