Article ID: 125805, created on Jun 9, 2015, last review on Jun 9, 2015

  • Applies to:
  • Plesk 11.0 for Linux
  • Plesk 11.5 for Linux


Migration failed with error below:

rsync execution error: Unknown error (255).  
Host key verification failed. 

It is not possible to run ssh command on the server:

~# ssh root@   
Host key verification failed.


Error is caused by a udev problem (udev is a device manager for the Linux kernel that primarily manages device nodes in /dev), /dev/tty (which is a file system object that represents the current console) is absent:

~#ls -ls /dev/tty  
ls: cannot access /dev/tty: No such file or directory


Create /dev/tty device:

    mknod -m 666 /dev/tty c 5 0

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Host key verification failed

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