As a result of running the demos on a Ubuntu 16.04 LTS, I am unable to open further Linux terminals, either as root or non-root. I think this may have something to do with the pseudo-terminal implementation. After running the demos (e.g. Demo 1), I need a complete reboot of the Ubuntu OS (not just a user logoff) to restore original terminal behavior. The OS build is as follows: Linux nuc0015 4.4.0-112-generic #135-Ubuntu SMP Fri Jan 19 11:48:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux The error messages I receive are as follows when attempting to open a Linux terminal: ptsname_r failed: Inappropriate ioctl for device - for root terminal getpt failed: permission denied - from non-root terminal
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