~$ sudo apt update; sudo apt full-upgrade
[sudo] password for ksbalaji:
Ign:1 http://ppa.launchpad.net/apt-fast/stable/ubuntu xenial InRelease
Ign:2 http://security.ubuntu.com/ubuntu xenial-security InRelease
Ign:3 http://archive.canonical.com/ubuntu xenial InRelease
Hit:4 http://in.archive.ubuntu.com/ubuntu xenial InRelease
Hit:5 http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu xenial InRelease
0% [4 InRelease gpgv 247 kB] [Waiting for headers] [Waiting for headers] [WaitiCouldn't create tempfiles for splitting up /var/lib/apt/lists/in.archive.ubuntu.cErr:4 http://in.archive.ubuntu.com/ubuntu xenial InRelease
Could not execute 'apt-key' to verify signature (is gnupg installed?)
0% [5 InRelease gpgv 17.6 kB] [Waiting for headers] [Waiting for headers] [WaitCouldn't create tempfiles for splitting up /var/lib/apt/lists/ppa.launchpad.net_dErr:5 http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu xenial InRelease
Could not execute 'apt-key' to verify signature (is gnupg installed?)
Ign:6 http://in.archive.ubuntu.com/ubuntu xenial-updates InRelease
Err:7 http://archive.canonical.com/ubuntu xenial Release
Could not open file /var/lib/apt/lists/partial/archive.canonical.com_ubuntu_dists_xenial_Release - open (28: No space left on device) [IP: 2001:67c:1360:8c01::16 80]
Err:8 http://security.ubuntu.com/ubuntu xenial-security Release
Could not open file /var/lib/apt/lists/partial/security.ubuntu.com_ubuntu_dists_xenial-security_Release - open (28: No space left on device) [IP: 2001:67c:1562::19 80]
Hit:9 http://ppa.launchpad.net/morphis/anbox-support/ubuntu xenial InRelease
0% [9 InRelease gpgv 17.5 kB] [Connecting to in.archive.ubuntu.com (2001:67c:15Couldn't create tempfiles for splitting up /var/lib/apt/lists/ppa.launchpad.net_mErr:9 http://ppa.launchpad.net/morphis/anbox-support/ubuntu xenial InRelease
Could not execute 'apt-key' to verify signature (is gnupg installed?)
Ign:10 http://in.archive.ubuntu.com/ubuntu xenial-backports InRelease
Err:11 http://ppa.launchpad.net/apt-fast/stable/ubuntu xenial Release
Could not open file /var/lib/apt/lists/partial/ppa.launchpad.net_apt-fast_stable_ubuntu_dists_xenial_Release - open (28: No space left on device)
Err:12 http://in.archive.ubuntu.com/ubuntu xenial-updates Release
Could not open file /var/lib/apt/lists/partial/in.archive.ubuntu.com_ubuntu_dists_xenial-updates_Release - open (28: No space left on device) [IP: 2001:67c:1562::19 80]
Err:13 http://in.archive.ubuntu.com/ubuntu xenial-backports Release
Could not open file /var/lib/apt/lists/partial/in.archive.ubuntu.com_ubuntu_dists_xenial-backports_Release - open (28: No space left on device) [IP: 2001:67c:1360:8001::21 80]
Reading package lists... Error!
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://in.archive.ubuntu.com/ubuntu xenial InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu xenial InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
E: The repository 'http://archive.canonical.com/ubuntu xenial Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://security.ubuntu.com/ubuntu xenial-security Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ppa.launchpad.net/morphis/anbox-support/ubuntu xenial InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
E: The repository 'http://ppa.launchpad.net/apt-fast/stable/ubuntu xenial Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://in.archive.ubuntu.com/ubuntu xenial-updates Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://in.archive.ubuntu.com/ubuntu xenial-backports Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Couldn't create temporary file to work with /var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_xenial_InRelease - mkstemp (28: No space left on device)
E: The package lists or status file could not be parsed or opened.
E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.