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2

Hot tip: You don't need 'apt-get' in 16.04, only 'apt'. Example: sudo apt install aptitude


3

You can always use sudo apt-get update sudo apt-get upgrade to update your system, but if you like using aptitude sudo apt-get install aptitude should install aptitude.


0

Seems https://launchpad.net/ubuntu/xenial/+source/aptitude is available. Just open your terminal and type sudo apt-get install aptitude Then try again. Thank you.


0

This seems to be caused by apparmor as you will find something similar to this in your syslog: kernel: [ 2386.130467] audit: type=1400 audit(1461767119.644:89): apparmor="DENIED" operation="create" profile="/usr/sbin/libvirtd" pid=21368 comm="libvirtd" family="netlink" sock_type="raw" protocol=0 requested_mask="create" denied_mask="create" Until the ...


2

They haven't been purged because there's no reason to. The kernel files left are mostly those concerning dpkg. There's no harm in having them around. As for purging them: aptitude purge '~c'


1

From this launchpad bug it looks like running the following will fix your issue: sudo apt-get install aptitude libapt-pkg4.16 If you get unable to locate package libapt-pkg4.16 run this: apt-cache search libapt-pkg | grep 'package management' | cut -d ' ' -f1 And replace libapt-pkg4.16 with whatever output you get from there (for me on 14.04 it's ...


0

If all else fails. What I did was I first changed the directory to: cd /var/lib/dpkg/info then I removed everything with .postinst: rm *.postinst then everything went back to normal when I did: apt-get --force-yes install openjdk-7-jre-headless



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