On Mon, May 13, 2019 at 04:20:17PM -0400, Bee.Lists wrote:
> > On May 13, 2019, at 2:46 PM, Pete Biggs <pete@xxxxxxxxxxxx> wrote:
> > Why do you think that? '~' is just shell shorthand for user's home
> > directory.
>
> root quite often isn’t recognized as a proper user. ~/.bash_profile
> isn’t loaded because it’s not a normal login shell when entering
> `su`.
You'd find that if there's another user account on your system (lets
call it "fred"), and you ran 'su fred', it would not load
~fred/.bash_profile either, because it wasn't a login shell. 'root'
isn't special here.
> Isn’t moving from my own user using su, then prompted for password
> count as a login?
As you read in the 'bash' man page, files that are loaded with a
"login shell" are different from files loaded from a normal shell
execution. 'su' has specific syntax for either running a shell as a
user or running a login shell as a user. Just typing a password at
the prompt doesn't mean it was a login shell.
Typically, a 'login shell' is what you get when you log into a system
through login: or a graphical login. .bash_profile is loaded once
when you log in. It's meant for login stuff. .bashrc is loaded for
every shell you start.
'su' is a tool used to switch users, so you are given the option to
either start a shell as a user or log in as that user, depending on
the situation.
> man su doesn’t apply to root with regards to the files loaded up
> upon login. Consequences of reading generic man pages result in
> more than one option.
The 'su' man page explains all of this pretty well I think. Becoming
root isn't special, in terms of loading .bash_profile vs. .bashrc.
--
Jonathan Billings <billings@xxxxxxxxxx>
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