Unable to open pty: No such file or directory

Howto's and FAQ's - Virtualization
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Unable to open pty: No such file or directory is a well know message when you try to enter the VPS from the hardwarenode using vzctl enter VEID. It is related to udev. To fix this issue edit the file /etc/rc.sysinit of the container: 
vzctl exec VEID /sbin/MAKEDEV pty
vzctl exec VEID /sbin/MAKEDEV tty
vzctl enter VEID
vi /etc/rc.sysinit
search and comment the line /sbin/start_udev and add the following lines: 
/sbin/MAKEDEV tty
/sbin/MAKEDEV pty
Log out and reboot the container. Check this whenever you update your server.
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