su: cannot set user id: Resource temporarily unavailable

[Shawn O'Shea]

Not directly related to the issue, but I thought I'd not that you don't
have to have sudo exec an su with the  "sudo su - user", you can get an
interactive shell from sudo directly: sudo -i -u user

-i says you want an interactive login shell. If you don't specify "-u
username" then it assumes root.

-Shawn


On Mon, Mar 10, 2014 at 10:44 AM, Brian Chabot <brian at brianchabot.org>wrote:

> THANK YOU!
>
> I found the error.
>
> Thanks to Ken for the strace idea, I looked through the resultant log
> and found this line:
>
> 9519  read(8, "# Default limit for number of user's processes to
> prevent\n# accidental fork bombs.\n# See rhbz #432903 for
> reasoning.\n\n*          soft    nproc     1024\nroot       soft
> nproc     unlimited\n", 4096) = 191
>
> That didn't jive with /etc/security/limits.conf so it stood out in my
> visual scan.
>
> Looking up a few lines to see where it got that from I see:
>
> 9519  open("/etc/security/limits.d/90-nproc.conf", O_RDONLY) = 8
>
> Ok, so /etc/security/limits.d/90-nproc.conf over-rules
> /etc/security/limits.conf
>
> Good to know.
>
> I raised the nproc limit and the su- worked.
>
> Thanks again to all of you.
>
> Brian
> Brian Chabot
>
>
> On Mon, Mar 10, 2014 at 10:32 AM, Mark Komarinski <mkomarinski at wayga.org>
> wrote:
> >
> > On 3/10/2014 10:20 AM, Brian Chabot wrote:
> >> Also, disk space and RAM are aplenty...
> >>
> >> Is there any way to tell *which* resource is unavailable?
> >> Brian Chabot
> >>
> >
> > Two other thoughts:
> >
> > - Is SELinux enabled?  Check the logs and see if there's anything
> > strange there.
> > - try using strace to see which call returns the error.  It might give
> > you a clue about what it's trying to do.
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