I am having exactly the same problem (I tried installing a openvpn server inside the LXC and needed to use autodev to setup TUN interface). My host machine failed shortly after:
cat > /usr/share/lxc/config/common.conf.d/02-openvpn-auto-tun.conf << EOL lxc.hook.autodev = /usr/share/lxc/hooks/openvpn-auto-tun EOL cat > /usr/share/lxc/hooks/openvpn-auto-tun << EOL #!/bin/bash cd ${LXC_ROOTFS_MOUNT}/dev mkdir net mknod net/tun c 10 200 chmod 0666 net/tun EOL chmod 755 /usr/share/lxc/hooks/openvpn-auto-tun -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1425477 Title: After some time of LXC usage SSH fails with `openpty: Permission denied` Status in lxc package in Ubuntu: Invalid Bug description: I'm running Ubuntu 14.04.2 LTS on GNU/Linux 3.13.0-45-generic x86_64 as a host machine for tests run on LXC guests. After a few test runs on LXC machines, startup of next LXC machine hangs indefinitely. At the same time SSH connections to the host machine display "PTY allocation request failed on channel 0" and SSH logs in auth.log Feb 25 05:19:28 remotedev sshd[18578]: error: openpty: Permission denied Feb 25 05:19:28 remotedev sshd[18628]: error: session_pty_req: session 0 alloc failed Only reboot brings the machine back to usable state. I've tried destroying the non-starting LXC guest, stopping removing all guests, purging lxc and lxc-templates. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1425477/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp