Looking at the logs, the error is:
useradd: cannot lock /etc/group; try again later.
adduser: `/usr/sbin/useradd -d /var/run/sshd -g nogroup -s
/usr/sbin/nologin -u 115 sshd' returned error code 10. Exiting.
I suspect there is a stale /etc/group.lock file that you should remove
(sudo rm /etc/group.lock). Please confirm that it allows to solve the
situation. Then this bug would be a duplicate of bug 523896.
** Changed in: openssh (Ubuntu)
Importance: Undecided => Low
** Changed in: openssh (Ubuntu)
Status: New => Incomplete
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package ssh (not installed) failed to install/upgrade: προβλήματα εξάρτησης -
αφήνεται μη ρυθμισμένο
https://bugs.launchpad.net/bugs/623780
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