Preparing to unpack .../flashplugin-installer_26.0.0.131ubuntu0.16.04.1_amd64.deb ...
Unpacking flashplugin-installer (26.0.0.131ubuntu0.16.04.1) over (26.0.0.126ubuntu0.16.04.1) ...
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Examining /etc/kernel/preinst.d/
run-parts: executing /etc/kernel/preinst.d/intel-microcode 4.8.0-56-generic /boot/vmlinuz-4.8.0-56-generic
Done.
Unpacking linux-image-4.8.0-56-generic (4.8.0-56.61~16.04.1) ...
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Preparing to unpack .../linux-generic-hwe-16.04_4.8.0.56.27_amd64.deb ...
Unpacking linux-generic-hwe-16.04 (4.8.0.56.27) over (4.8.0.54.25) ...
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Unpacking linux-headers-generic-hwe-16.04 (4.8.0.56.27) over (4.8.0.54.25) ...
Processing triggers for update-notifier-common (3.168.4) ...
flashplugin-installer: processing...
flashplugin-installer: downloading http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-flashplugin_20170616.1.orig.tar.gz

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Get:1 http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-flashplugin_20170616.1.orig.tar.gz [30.4 MB]

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Fetched 30.4 MB in 3s (9,279 kB/s)
W: Can't drop privileges for downloading as file '/var/lib/update-notifier/package-data-downloads/partial/adobe-flashplugin_20170616.1.orig.tar.gz' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
Installing from local file /var/lib/update-notifier/package-data-downloads/partial/adobe-flashplugin_20170616.1.orig.tar.gz
Flash Plugin installed.
Processing triggers for libc-bin (2.23-0ubuntu9) ...
dpkg: error processing package linux-firmware (--configure):
 package linux-firmware is not ready for configuration
 cannot configure (current status 'half-installed')
Setting up libc6-dbg:amd64 (2.23-0ubuntu9) ...