[mosh-devel] mosh and utmp on athena.dialup.mit.edu

[Lizhou Sha]

Hi Keith,

I'm observing a regression for my self-deployed Ubuntu 16.04 dialup
with regards to libprotobuf linkage:

$ mosh --ssh="ssh -K" --server="athrun mosh_project mosh-server"
sha.mit.edu -- byobu a -d
/afs/sipb.mit.edu/project/mosh/arch/amd64_deb60/bin/mosh-server.real:
error while loading shared libraries: libprotobuf.so.8: cannot open
shared object file: No such file or directory
Connection to sha.mit.edu closed.
/usr/bin/mosh: Did not find mosh server startup message.

Best,
Lizhou

On Fri, Feb 24, 2017 at 4:39 PM, Keith Winstein <keithw at cs.stanford.edu> wrote:
> Hello Jonathon,
>
> I deployed a new build of mosh-server for amd64 architectures (compiled on
> test.dialup) in the mosh_project locker. It seems to be updating utmp now.
> Please let me know if you see any trouble.
>
> -Keith
>
> On Fri, Feb 24, 2017 at 1:17 PM, Jonathon Weiss <jweiss at mit.edu> wrote:
>>
>> Hi Keith,
>>
>> libutempter-dev is now installed on test.dialup.mit.edu.  It should hit
>> the production dialups over the course of next week, but doing your
>> build on test.dialup.mit.edu should be fine.  thanks for the help.
>>
>>         Jonathon
>>
>>
>>
>> Keith Winstein <keithw at cs.stanford.edu> wrote:
>>
>> > Hello Jonathon,
>> >
>> > I investigated and it's probably my fault -- I'm compiling and
>> > statically
>> > linking on an Ubuntu system that expects it
>> > in /usr/lib/x86_64-linux-gnu/utempter/utempter, and athena.dialup has it
>> > in /usr/lib/utempter/utempter.
>> >
>> > Could you please install libutempter-dev on the dialups? Then I can
>> > compile
>> > on Athena, and my guess is it will start working again. (Or I can spin
>> > up a
>> > VM that more closely matches the dialups if necessary.)
>> >
>> > (Anton, this is a bit of a special case as I am the one who is building
>> > and
>> > installing Mosh at MIT -- we use this to test release candidates.)
>> >
>> > Regards,
>> > Keith
>> >
>> > On Thu, Feb 23, 2017 at 2:50 PM, Jonathon Weiss <jweiss at mit.edu> wrote:
>> >
>> > >
>> > > Hello all,
>> > >
>> > > Following up on a zephyr conversation I had with Keith and others
>> > > about a week ago, I was wondering why mosh logins don't appear in the
>> > > output of "who" or "w" on the athena.dialup.mit.edu servers.  We got
>> > > as far as confirming that utempter was setgid utmp:
>> > >
>> > > -rwxr-sr-x 1 root utmp 10104 Oct  5  2012 /usr/lib/utempter/utempter
>> > >
>> > > oh, these files also appear to me ot have reasonable permissions:
>> > >
>> > > -rw-rw-r-- 1 root utmp 190080 Feb 23 17:47 /var/run/utmp
>> > >
>> > > -rw-rw-r-- 1 root utmp 2704128 Feb 23 17:45 /var/log/wtmp
>> > >
>> > > -rw-rw---- 1 root utmp 992640 Feb 23 17:25 /var/log/btmp
>> > >
>> > > Anything you can suggest to check?  Anyhting I can do to help debug?
>> > >
>> > >         Jonathon
>> > >
>> > >         Jonathon Weiss <jweiss at mit.edu>
>> > >         MIT/IS&T/Infrastructure Design & Engineering
>> > >         Cloud Platforms (Server Operations)
>> > > _______________________________________________
>> > > mosh-devel mailing list
>> > > mosh-devel at mit.edu
>> > > http://mailman.mit.edu/mailman/listinfo/mosh-devel
>> > >
>> >
>> > ----------------------------------------------------
>> > Alternatives:
>> >
>> > ----------------------------------------------------
>>
>
>
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>



-- 
Lizhou Sha
Massachusetts Institute of Technology
Department of Physics