cat /etc/apt/sources.list
ls -l /etc/apt/sources.list.d
sudo nano /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
# deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://archive.canonical.com/ubuntu xenial partner
# deb-src http://archive.canonical.com/ubuntu xenial partner
Ign:1 http://archive.ubuntu.com/ubuntu xenial InRelease
Ign:2 http://security.ubuntu.com/ubuntu xenial-security InRelease
Ign:3 http://archive.canonical.com/ubuntu xenial InRelease
Ign:4 http://archive.ubuntu.com/ubuntu xenial-updates InRelease
Ign:5 http://archive.ubuntu.com/ubuntu xenial-backports InRelease
Err:6 http://archive.ubuntu.com/ubuntu xenial Release
Undetermined Error
Err:7 http://security.ubuntu.com/ubuntu xenial-security Release
Undetermined Error
Err:8 http://archive.canonical.com/ubuntu xenial Release
Undetermined Error
Err:9 http://archive.ubuntu.com/ubuntu xenial-updates Release
Undetermined Error
Err:10 http://archive.ubuntu.com/ubuntu xenial-backports Release
Undetermined Error
Lettura elenco dei pacchetti...
sudo apt-get clean
sudo apt-get autoclean
sudo apt-get update
ls -l /var/cache/apt/archives
total 4
-rw-r----- 1 root root 0 lug 31 02:32 lock
drwx------ 2 _apt root 4096 gen 23 11:48 partial
sudo apt-key list
/etc/apt/trusted.gpg
--------------------
pub 1024D/437D05B5 2004-09-12
uid Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
sub 2048g/79164387 2004-09-12
pub 4096R/C0B21F32 2012-05-11
uid Ubuntu Archive Automatic Signing Key (2012) <ftpmaster@ubuntu.com>
pub 4096R/EFE21092 2012-05-11
uid Ubuntu CD Image Automatic Signing Key (2012) <cdimage@ubuntu.com>
pub 1024D/FBB75451 2004-12-30
uid Ubuntu CD Image Automatic Signing Key <cdimage@ubuntu.com>
deb http://archive.ubuntu.com/ubuntu/ xenial main
sudo apt update
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