Я пытаюсь обновить сервер Ubuntu с 16.04 до 18.04, используя do-release-upgrade но он сразу выдает ошибку:

Traceback (most recent call last): 

File "/tmp/ubuntu-release-upgrader-074vyz42/bionic", line 8, in 
<module> 
sys.exit(main()) 

File 
"/tmp/ubuntu-release-upgrader-074vyz42/DistUpgrade/DistUpgradeMain.py", 
line 238, in main 
if app.run(): 

File 
"/tmp/ubuntu-release-upgrader-074vyz42/DistUpgrade/DistUpgradeController.py", 
line 2053, in run 
return self.fullUpgrade() 

File 
"/tmp/ubuntu-release-upgrader-074vyz42/DistUpgrade/DistUpgradeController.py", 
line 1936, in fullUpgrade 
if not self.cache.anyVersionDownloadable(self.cache[pkg]): 

File "/usr/lib/python3/dist-packages/apt/cache.py", line 233, in 
__getitem__ 
raise KeyError('The cache has no package named %r' % key) 

KeyError: "The cache has no package named 'ubuntu-minimal'" 

Похоже, эта ошибка, но отчет об ошибке за несколько месяцев назад и не было никакого внимания. https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1795207

ubuntu-minimal не является ни удаленной, ни доступной:

root@tooticky:~# apt install ubuntu-minimal
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package ubuntu-minimal

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