# aptitude update
[...]
Setting up openssh-server (1:7.4p1-9) ...
Replacing config file /etc/ssh/sshd_config with new version
Connection to leon-00 closed by remote host.
Connection to leon-00 closed.


# dpkg --configure -a
[...]
Setting up openssh-server (1:7.4p1-9) ...
Connection to leon-00 closed by remote host.
Connection to leon-00 closed.

... and bug is now completely preventing update:

# dpkg --configure -a
Setting up openssh-server (1:7.4p1-9) ...
Connection to leon-00 closed by remote host.
Connection to leon-00 closed.

$ dpkg --configure -a
Setting up openssh-server (1:7.4p1-9) ...
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
debconf: unable to initialize frontend: Readline
debconf: (This frontend requires a controlling tty.)
debconf: falling back to frontend: Teletype
Connection to leon-00 closed by remote host.

If you don't know, or can not use screen, you are stuck.

-- 
 >o_/ DEMAINE Benoît-Pierre (aka DoubleHP) http://benoit.demaine.info/
If computing were an exact science, IT engineers would'nt have work \_o<

"So all that's left, Is the proof that love's not only blind but deaf."
(FAKE TALES OF SAN FRANCISCO, Arctic Monkeys)

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