V konzoli napiš update-manager a pokud to napíše chybu, dej ji sem.
tonik@tonikovo-pc:~$ update-manager
Traceback (most recent call last):
File "/usr/bin/update-manager", line 122, in <module>
app = UpdateManager(data_dir, options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 128, in __init__
self.meta_release = MetaRelease(
^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/UpdateManager/MetaReleaseGObject.py", line 42, in __init__
MetaReleaseCore.__init__(
File "/usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py", line 103, in __init__
cache = apt.Cache()
^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/apt/cache.py", line 157, in __init__
self.open(progress)
File "/usr/lib/python3/dist-packages/apt/cache.py", line 214, in open
self._cache = apt_pkg.Cache(progress)
^^^^^^^^^^^^^^^^^^^^^^^
apt_pkg.Error: E:Zkomolený řádek 1 v sources souboru /etc/apt/sources.list.d/third-party.sources (URI parse), E:Nelze přečíst seznam zdrojů.