Unable to Upgrade Ubuntu

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UnicodeDecodeError: 'utf-8' codec can't decode byte

When attempting to update Ubuntu from version 14.04 LTS to 16.04, you may encounter an error when entering the following command:

do-release-upgrade
TS1.png

This error is caused by non UTF-8 characters in the /var/lib/dpkg/status file. Follow the instructions below to identify and remove these characters.

  1. Enter the following command:
    grep -avx '.*' /var/lib/dpkg/status
    This will display any not UTF-8 characters in the file.
    TS1.png
  2. Enter the following command:
    sudo nano /var/lib/dpkg/status
  3. Locate the bad characters, and delete them.
  4. Save the file.

/boot is out of space

  1. Enter the following command:
    dpkg -l | grep linux-image
    This will display all the kernels currently installed. All but the most recent can be safely deleted.
  2. Enter the following:
    apt-get remove ''old-linux-kernel-package-name''
Ex: ''apt-get remove linux-image-3.13.0-32-generic''