Solved: unable to allocate pty when ssh to Fedora 6 nfsroot - users - Fedora Mailing-Lists

Friday, 29 February 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 ...
device file):

devpts                  /dev/pts                devpts  gid=5,mode=620  0 0

- V.

On Fri, Feb 29, 2008 at 2:12 AM, vincenzo romero <new2xen(a)gmail.com&gt; 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:  2.6.22.14 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[2964]: Accepted password for sofia from
  127.0.0.1 port 36123 ssh2
  Feb 28 17:55:09 localhost sshd[2964]: error: openpty: No such file or directory
  Feb 28 17:55:09 localhost sshd[2966]: 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@test1 tmp]# ssh 192.168.16.29 bash -i
  sofia(a)192.168.16.29&#39;s password:
  [sofia@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.

  --
  best,

  Vince

-- 
best,

Vince