switching users...

[mw_4]

what shuld I do?
can not switch users.

#
# su - abc


then wait time and no respond.
what's problem.
before it occurs I can see the system messages.
'expire users. and change passwd'
so I change the user after expired date.
some users can be switched normally, but some users are still no respond..
what shall I do?

[Michael Tully]

This is most likely a trusted system, that has had many password expire at the same time. You don't have disk quotas enabled do you?

[mw_4]

yes I do..
I did not have disk quota enabled.

[Michael Tully]

Seeing this is the case, (trusted system) why can't the user change their own passwords and not switch users.
Are these accounts 'su only accounts' for applications ??