Solved: unable to allocate pty when ssh to Fedora 6 nfsroot
new2xen at gmail.com
Fri Feb 29 23:39:19 UTC 2008
The problem I reported below was caused by not having the devpts
mounted in my /etc/fstab. When I created my NFSROOT, I edited the
fstab to place the nfs-mounted root line; and in doing so the special
mounts - /proc, /sys, /dev/pts were also removed.
by adding the following in my /etc/fstab, I was then able to ssh ....
(doh, obviously it is able to create the necessary /dev/pts/0 ...
devpts /dev/pts devpts gid=5,mode=620 0 0
On Fri, Feb 29, 2008 at 2:12 AM, vincenzo romero <new2xen at gmail.com> wrote:
> Hello all,
> I am unable to ssh into a diskless host running Fedora. When I boot
> into the golden image (same kernel and root files), I can ssh.
> Perhaps I'm missing something?
> Description: Fedora 6 - kernel: 220.127.116.11 which I recompiled in
> order to make the necessary kernel changes to support NFSROOT.
> Problem: The host boots ok via PXE as expected. I can login into the
> host via tty. Attempts to ssh from another host causes it to hang. I
> checked its /var/log/secure message and found the following:
> Feb 28 17:55:09 localhost sshd: Accepted password for sofia from
> 127.0.0.1 port 36123 ssh2
> Feb 28 17:55:09 localhost sshd: error: openpty: No such file or directory
> Feb 28 17:55:09 localhost sshd: error: session_pty_req: session
> 0 alloc failed
> 1. I also tried to ssh to localhost on the machine, it hangs too.
> 2. I looked at the /dev/pts - and I notice that nothing is created there.
> 3. I boot into the golden image running same kernel but root is on
> disk. I can successfully ssh into this box; and notice that when
> ssh'ing the /dev/pts/0 directory(ies) are created appropriately.
> 4. As I googled further ... I stumbled into a suggestion to perform
> the following:
> ssh <host> bash -i
> I performed this, and I am able to ssh into the box:
> [sofia at test1 tmp]# ssh 192.168.16.29 bash -i
> sofia at 192.168.16.29's password:
> [sofia at localhost ~]# ls -al
> total 200
> Any thought? Perhaps I'm missing something obvious ... I will also
> post this question in an ssh list.
> Thanks in advance.
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