I am trying to update an instance on AWS.  I have little familiarity with linux in general.  However, I did run the command on my Ras. Pi first and had no problems.  However this is the second time the process has hung here.  Last time I pressed the enter key, and more lines showed up but eventually I was disconnected and the next time I logged in I was told I had a Zombie process running.  I rebooted and tried apt-get upgrade again and still am confronted with this after a bit of timeHere is the content119 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.Need to get 0 B/77.0 MB of archives.After this operation, 8,320 kB of additional disk space will be used.Do you want to continue [Y/n]? YE: Version '2.02.66-4ubuntu7.4' for 'libdevmapper1.02.1' was not foundE: Version '2.02.66-4ubuntu7.4' for 'dmsetup' was not foundE: changelog for this version is not (yet) available; try https://launchpad.net/ubuntu/+source/update-manager/+changelogE: Version '2.02.66-4ubuntu7.4' for 'libdevmapper-event1.02.1' was not foundReading changelogs... Doneca-certificates (20130906) unstable; urgency=low   Update mozilla/certdata.txt to version 1.86      Certificates added (+) (none removed):     + Actalis Authentication Root CA     + Trustis FPS Root CA     + StartCom Certification Authority (renewal/rehash)     + StartCom Certification Authority G2     + Buypass Class 2 Root CA     + Buypass Class 3 Root CA/tmp/tmpEp5oWU
How do I resolve an apparent hanging update process
linux;apt;upgrade
You are in a pager program, where you can scroll through the change logs of the packages that you are installing. Ubuntu's default pager (like most unices out there, except some embedded or antique systems which have the more primitive more) is less.The installation process is not hung: it's waiting for you to read the changes. You can use arrow or page keys to scroll through the file. Pressing Space goes down by one page and pressing Return goes down by one line. Eventually you'll get to the (END). You can press Q at any time to quit.Once you quit the pager, you'll be asked whether to confirm or cancel the upgrades.The intent of showing you the change logs is that you can cancel the upgrade if some change looks like it might break your system. This is useful for people who use a bleeding-edge distribution such as Debian unstable and even there, it is not terribly useful. If you use the stable distribution, you'll only get security and major stability updates which you always should apply as soon as possible.This behavior is caused by the apt-listchanges package. You can uninstall the package in your favorite package manager; on the command line, run apt-get remove apt-listchanges (e.g. sudo apt-get remove apt-listchanges if you use sudo).