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Having set a lecture with Default lecture=always and Default lecture_file=/etc/sudoers.lecture, I would like to add colour to it. ANSI escape characters show without escaping, and creating a wrapper function displays it every time I use sudo, even if the password is in the cache.

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    What is a lecture? – k.stm Aug 23 '19 at 17:05
  • @k.stm This is described in the sudoers(5) manual. It is the short text that is outputted upon first using sudo, which (by default) reminds the user to use the command responsibly. – Kusalananda♦ Aug 23 '19 at 17:22
  • Cannot reproduce here; using the appropriate tput output, I created a file that sudo dutifully outputted in color. How did you produce the /etc/sudoers.lecture file? – Jeff Schaller♦ Aug 23 '19 at 18:38
  • Related: unix.stackexchange.com/q/9957/117549 – Jeff Schaller♦ Aug 23 '19 at 18:39
  • @JeffSchaller, I also don't know how tput works. – gadzooks02 Aug 25 '19 at 18:28
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Using:

echo $(tput setaf <colour>)<text>$(tput sgr0) >> /etc/sudoers.lecture

adds coloured text to /etc/sudoers.lecture

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