Quando executo sudo apt-get updatea partir de uma sessão USB ativa padrão (Ubuntu Desktop 17.10), por que recebo esse erro?
Ign:1 cdrom://Ubuntu 17.10 _Artful Aardvark_ - Release amd64 (20180105.1) artful InRelease
Hit:2 cdrom://Ubuntu 17.10 _Artful Aardvark_ - Release amd64 (20180105.1) artful Release
Hit:3 http://archive.ubuntu.com/ubuntu artful InRelease
Hit:4 http://security.ubuntu.com/ubuntu artful-security InRelease
Hit:5 http://archive.ubuntu.com/ubuntu artful-updates InRelease
Get:7 http://archive.ubuntu.com/ubuntu artful/main Translation-en_GB [71.1 kB]
Get:8 http://archive.ubuntu.com/ubuntu artful/restricted Translation-en_GB [2,464 B]
Fetched 73.6 kB in 0s (216 kB/s)
Reading package lists... Done
W: chown to _apt:root of file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_artful_InRelease failed - Item::QueueURI (95: Operation not supported)
W: chmod 0600 of file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_artful_InRelease failed - Item::QueueURI (95: Operation not supported)
W: chown to root:root of file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_artful_InRelease failed - 201::URIDone (95: Operation not supported)
W: chmod 0644 of file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_artful_InRelease failed - 201::URIDone (95: Operation not supported)
Quando eu corro ls -al /var/lib/apt/lists/, isso mostra
ubuntu@ubuntu:~$ ls -al /var/lib/apt/lists/
total 12285
drwxr-xr-x 1 root root 140 Feb 14 21:57 .
drwxr-xr-x 1 root root 80 Feb 14 21:57 ..
-rw-r--r-- 1 root root 236651 Oct 19 12:56 archive.ubuntu.com_ubuntu_dists_artful_InRelease
-rw-r--r-- 1 root root 6681096 Oct 19 12:56 archive.ubuntu.com_ubuntu_dists_artful_main_binary-amd64_Packages
-rw-r--r-- 1 root root 3402759 Oct 16 10:08 archive.ubuntu.com_ubuntu_dists_artful_main_i18n_Translation-en
-rw-r--r-- 1 root root 110861 Oct 19 12:56 archive.ubuntu.com_ubuntu_dists_artful_restricted_binary-amd64_Packages
-rw-r--r-- 1 root root 18974 Oct 13 11:12 archive.ubuntu.com_ubuntu_dists_artful_restricted_i18n_Translation-en
-rw-r--r-- 1 root root 78587 Jan 5 20:32 archive.ubuntu.com_ubuntu_dists_artful-updates_InRelease
-rw-r--r-- 1 root root 866650 Jan 5 18:44 archive.ubuntu.com_ubuntu_dists_artful-updates_main_binary-amd64_Packages
-rw-r--r-- 1 root root 462155 Jan 5 06:05 archive.ubuntu.com_ubuntu_dists_artful-updates_main_i18n_Translation-en
-rw-r--r-- 1 root root 19723 Nov 10 14:56 archive.ubuntu.com_ubuntu_dists_artful-updates_restricted_binary-amd64_Packages
-rw-r--r-- 1 root root 3724 Nov 8 21:27 archive.ubuntu.com_ubuntu_dists_artful-updates_restricted_i18n_Translation-en
-rw-r----- 1 root root 0 Jan 5 20:35 lock
drwx------ 1 _apt root 40 Feb 14 21:57 partial
-rw-r--r-- 1 root root 78589 Jan 5 20:32 security.ubuntu.com_ubuntu_dists_artful-security_InRelease
-rw-r--r-- 1 root root 347191 Jan 5 11:18 security.ubuntu.com_ubuntu_dists_artful-security_main_binary-amd64_Packages
-rw-r--r-- 1 root root 202149 Jan 4 16:16 security.ubuntu.com_ubuntu_dists_artful-security_main_i18n_Translation-en
-rw-r--r-- 1 root root 48945 Feb 14 21:57 Ubuntu%2017.10%20%5fArtful%20Aardvark%5f%20-%20Release%20amd64%20(20180105.1)_dists_artful_main_binary-amd64_Packages
-rw-r--r-- 1 root root 3355 Feb 14 21:57 Ubuntu%2017.10%20%5fArtful%20Aardvark%5f%20-%20Release%20amd64%20(20180105.1)_dists_artful_Release
-rw-r--r-- 1 root root 819 Feb 14 21:57 Ubuntu%2017.10%20%5fArtful%20Aardvark%5f%20-%20Release%20amd64%20(20180105.1)_dists_artful_Release.gpg
-rw-r--r-- 1 root root 4629 Feb 14 21:57 Ubuntu%2017.10%20%5fArtful%20Aardvark%5f%20-%20Release%20amd64%20(20180105.1)_dists_artful_restricted_binary-amd64_Packages
O código existente retornado é 100 (conforme fornecido por echo $?), o que indica um erro.
A razão pela qual pensei que isso era um problema para mim foi porque o próximo comando também falhou. Eu estava executando apt-get install some-package-i-wantede recebi o erro 'Não foi possível localizar o pacote'. Então presumi que o primeiro erro era a causa raiz. No entanto, acontece que o pacote não está disponível nos repositórios padrão da versão 17.10.
Resolvi o problema baixando e instalando o pacote .deb manualmente no site relevante.
Ainda estou interessado em entender o que significa a mensagem de erro original.