Well... I think bash actually has a builtin su... so if you reinstall bash (not a very big package anyway)... it might help. since you've already installed shadow again...
On what basis do you think this to be true?
I've never heard of such a capability in bash, and implementing it would (at least on today's systems, ones with passwords in /etc/shadow) introduce some security problems that a standalone su can minimize, if not eliminate.
Just to double check, I searched an online version of the bash man page for the string "su". It never appears, except as part of words like "subshell" and "substitute".
I hesitate actually to say that you are wrong, Alan, because it is always possible that I missed something. But I do think it worth asking how well-based your belief is.
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