On 29 June 2015 at 22:00, Russell Coker <[email protected]> wrote:
> Error1: > ssh_exchange_identification: Connection closed by remote host > > Error2: > ssh_exchange_identification: Connection closed by remote host > rsync: connection unexpectedly closed (0 bytes received so far) [Receiver] > rsync error: unexplained error (code 255) at io.c(605) [Receiver=3.0.9] > I normally see this error when there's some authentication problem. In the past, it has either been due to hosts.deny/hosts.allow rules, or if the server has no daemons available for authentication (the MaxStartups value in sshd_config). I also think I've seen it when the nofile ulimit has been reached for the user trying to authenticate. > > I'm getting lots of errors like the above from cron jobs in situtions where > running the same script from an interactive session works. The first > error is > from a cron job that rsync's files to a server and the second error is from > rsyncing files from the server via ssh. On one of my systems I've seen a > pair > of cron jobs fail with that error every half hour for the past 4 hours but > when I run both jobs from an interactive session they work every time. > > What can be different about the operation of ssh in this regard? It's a > passwordless login with RSA key so there's no reason for it to need user > input > and in any case the error message doesn't indicate that as being a problem. > > I've compared the cron environment with the environment from the > interactive > session and apart from /bin/sh (DASH on Debian) vs /bin/bash I can't see > anything of note. > > Any ideas? > Instead of trying an rsync, can you get the cron script to run a command via ssh, with max verbosity? e.g. ssh -vvv user@server /usr/bin/id just to see where the ssh process is failing? Sean > > -- > My Main Blog http://etbe.coker.com.au/ > My Documents Blog http://doc.coker.com.au/ > _______________________________________________ > luv-main mailing list > [email protected] > http://lists.luv.asn.au/listinfo/luv-main >
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