topic Re: tty errors while trying to login to the server in Operating System - HP-UX

tty errors while trying to login to the server

Venkat_11 — Mon, 09 Mar 2009 03:02:55 GMT

Here are the errors we getting when we tried to login to server using ssh.

ttytype: couldn't open /dev/tty for reading
stty: : Not a typewriter

But luckyly we have one active session on the server which we are trying to use to trouble shoot the issue. Here are the some of the parameters related to pts session on the server.

# kmtune -q nstrpty
Parameter Current Dyn Planned Module Version
===============================================================================
nstrpty 200 - 200

# ls /dev/pts | egrep -i '^[0-9]' | wc -w
60

# kmtune -q npty
Parameter Current Dyn Planned Module Version
===============================================================================
npty 200 - 200

# ps -ef | grep pty | wc -l
2

Can anybody help resolving this issue? Please let me know if you need more details regarding this concern.

Thanks and Regards
Venkat

Re: tty errors while trying to login to the server

點燃 — Mon, 09 Mar 2009 03:27:46 GMT

Hi,

Please have a look on these threads

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=50626

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1137691

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=950447

regards!

Re: tty errors while trying to login to the server

Asif Sharif — Mon, 09 Mar 2009 03:45:54 GMT

Hi Venkat,

http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1236573807343+28353475&threadId=950447

Regards,
Asif Sharif

Re: tty errors while trying to login to the server

new2008 — Mon, 09 Mar 2009 03:52:26 GMT

Hello,

We checked the permissions of /dev/tty's and /dev/pty's. It is Owner:bin and Group:tty. Also copied the /etc/profile from another server. Still we are getting the below error.

"Server refused to allocate pty
Not a terminal
stty: : Not a typewriter"

Regards

Re: tty errors while trying to login to the server

new2008 — Mon, 09 Mar 2009 09:29:08 GMT

Hi,

Could anyone hlep us resolve this issue. Any other solutions.

Regards

Re: tty errors while trying to login to the server

avizen9 — Mon, 09 Mar 2009 09:42:37 GMT

/dev/tty is charactor device file, it should have below permission /user/group please compare with it.

crw-rw-rw- 1 bin bin 207 0x000000 Feb 21 10:57 tty

also is it possible for you to copy this device file from any other working server which having same version of os, you should copy it with tar. (do tar and then do ftp over and then un-tar)

have you tried to run insf -e (this will create device file if it had deleted.)

also can you post bdf -l output,
let me know, thanks.

Re: tty errors while trying to login to the server

Laurent Menase — Mon, 09 Mar 2009 09:44:10 GMT

it is because if you use ssh to run a remote command (or with -T option), and in that case, there is no tty of control associated with your session.

so use ssh -t

# ssh -t hpfrcs24 tty
/dev/pts/0
# ssh hpfrcs24 tty
not a tty

Re: tty errors while trying to login to the server

new2008 — Mon, 09 Mar 2009 10:36:11 GMT

Hello

When i use ssh -t sername tty i get message as "not a tty"

Regards

Re: tty errors while trying to login to the server

Steven E. Protter — Mon, 09 Mar 2009 11:21:32 GMT

Shalom,

I suggest removing and rebuilding the tty device files.

rm them.

insf -e

# rebuilds them properly.

Not a typewriter may be an environment problem not a problem with the device files themselves.

Oracle commonly does this when it shells out because the Oracle OS shell contains no environment at all.

SEP

Re: tty errors while trying to login to the server

Laurent Menase — Mon, 09 Mar 2009 16:15:33 GMT

did you look at syslog?

you can also start sshd in debug mode.