Error on HP Server

[hmorrison]

Attempted to logon to HP rp8400 server running HPUX 11.11 and got the following message "Server refused to allocate pty" also "ttytype: couldn't open /dev/tty for reading".

What do you think could have caused this.

[Pete Randall]

Probably an insufficient setting for "npty".


Pete

[James George_1]

Hi

Check the no of pty in the system kernel ( # kmtune -l

If less , you might want to increase the npty value in kernel.

Rgds/ James

[Patrick Wallek]

Did this come when trying to login via telnet, ssh or something else?

Check npty, nstrpty and nstrtel kernel parameters. These may need to be adjusted, which will require the kernel to be rebuilt and the system rebooted.

[hmorrison]

Thans to all of you for the responses, however, I had checked the npty, its at 750. The nstrpty and nstrtel are both at 60. So I don't think the setting should be causing the problem, however I don't know

[Kent Ostby]

You probably need to increase NSTRPTY given your error message.


If you are getting the message about "stty: not a typewriter" as well then check your profiles and check the stty commands in there.

[Patrick Wallek]

npty & nstrpty info:
http://docs.hp.com/en/TKP-90202/re61.html?btnNext=next%A0%BB

nstrtel info:
http://docs.hp.com/en/TKP-90202/re65.html?btnNext=next%A0%BB

nstrtel actually controls the number of telnet device files that are configured. If more than 60 users need to connect via telnet, then you need to increase this parameter.

[Josiah Henline]

Run the following to command and check for the number of users logged in. Compare the list to a "who -u" output. If they are different, you may have /etc/utmp corruption. The system may think you have more users logged in than actually are.

last|grep "still logged in" |grep -v -e " ftp " -e reboot