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Re: Restart SSH Remotely?
- To: misc_(_at_)_openbsd_(_dot_)_org
- Subject: Re: Restart SSH Remotely?
- From: Ben Goren <ben_(_at_)_trumpetpower_(_dot_)_com>
- Date: Tue, 25 Jun 2002 13:15:51 -0700
On Tue, Jun 25, 2002 at 02:41:23PM -0500, Steve Halligan wrote:
> >This is probably one of those "Duh!" questions, but here
> >goes: I've installed OpenSSH 3.3, and now want to stop the old
> >sshd and start the new one. I'm not physically at the machine,
> >though. Since I'm connected through ssh, if I kill the current
> >sshd, will the current sshd child processes also be killed?
> >(If so, I won't be able to run the new sshd!) Or will be
> >connection still be OK?
> The answer is: If you Kill sshd, you connection go bye bye.
As Henning just stated, it won't. If you killed the child process
that's controlling your connection...but there's no need to do so.
> do this:
> 1) Connect via ssh
> 2) Fire up telnetd
STOP! STOP! STOP! DO NOT RUN TELNET A TELNET SERVER EXCEPT IN A
MOST CAREFULLY CONTROLLED AND SECURE ENVIRONMENT! THE INTERNET IS
NEITHER CONTROLLED NOR SECURE!
> 3) Disconnect ssh
> 4) connect via telnet
STOP! STOP! STOP! DO NOT ****EVER**** PERFORM REMOTE
ADMINISTRATION OVER TELNET!
> 5) kill and restart sshd
> 6) disconnect telnet
Even if you were to take the astoundingly idiotic path of using
telnet for this, there's no need to disconnect. TCP/IP allows tens
of thousands of simultaneous connections between two hosts,
including every imaginable protocol. Disconnect at this point and
you could well be just as screwed as if you improperly restarted
your ssh process in the first place.
> 7) connect via ssh
> 8) If it works ok, kill telnetd
Just kill telnetd, period.
Please, please don't give such bad advice!
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