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Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)       
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5666 (unattended-upgr)... 35s