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Re: [Help-bash] How to figure out what files has been loaded by bash?


From: Bob Proulx
Subject: Re: [Help-bash] How to figure out what files has been loaded by bash?
Date: Sat, 7 Feb 2015 17:32:33 -0700
User-agent: Mutt/1.5.23 (2014-03-12)

Peng Yu wrote:
> Bob Proulx wrote:
> > A useful debug technique is:
> >
> >   ssh -t localhost bash -ix
> 
> I tried the above command. I only see the login banner (on ubuntu) and
> then entered the password. Then it hangs. Does it mean something is
> wrong before bash is called?

I don't see any login banner on Ubuntu before the password prompt.  So
I am not sure if that is an important clue or not.  Then you say it
hangs.  Could it be waiting for input?  Try giving it some input or a
control-d to terminate input and see what it does.

But yes I would say that something is wrong before bash is called
then.

On Debian and Ubuntu ssh activity will be logged in /var/log/auth.log
and may contain clues as to what is happening.  If you have enough
access and control on the server machine I would start up a debug sshd
on a different port.  Then watch the debug output as you attempt to
log into it.

  # /usr/sbin/sshd -d -p 2222

Then try to log in using port 2222 and look for clues.

  $ ssh -p 2222 address@hidden

Bob



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