So I came across this error for the first time today when trying to SSH directly into a clients VPS.
login as: root
root@server’s password:
Server refused to allocate pty
stdin: is not a tty
After a quick google search I came across the fix.
[root@node /]# vzlist -a
VEID NPROC STATUS IP_ADDR HOSTNAME
1337 78 running 69.10.59.80 grumpy.thelinuxnoob.com
[root@node /]# vzctl exec 1337 /sbin/MAKEDEV ptyp
[root@node /]# vzctl exec 1337 /sbin/MAKEDEV tty
[root@node /]# vzctl exec 1337 /sbin/MAKEDEV pty
The issue should now be resolved and you can SSH into the VPS.
