Linux Mint 17.3

Поднял версию с 17.2

А дальше праздник закончилсяю. Пишу mintupgrade upgrade

Результат:

Reading package lists... Done

+ Checking if Linux Mint is up to date...
Traceback (most recent call last):
File "/usr/bin/mintupgrade", line 253, in <module>
upgrader.prepare()
File "/usr/bin/mintupgrade", line 87, in prepare
cache = apt.Cache()
File "/usr/lib/python3/dist-packages/apt/cache.py", line 108, in __init__
self.open(progress)
File "/usr/lib/python3/dist-packages/apt/cache.py", line 156, in open
self._list.read_main_list()
SystemError: E:Opening /etc/apt/sources.list.d/additional-repositories.list - ifstream::ifstream (13: Permission denied)


Команды
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

Уже нажимал. Ничего не поменялось. Как быть?