apt-get_update

root@vmhost:~# apt-get update
Get:1 http://si.archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Ign:1 http://si.archive.ubuntu.com/ubuntu xenial InRelease                         Couldn't create tempfiles for splitting up /var/lib/apt/lists/partial/si.archive.ubuntu.com_ubuntu_dists_xenial_InRelease
Get:3 http://si.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]
Ign:2 http://security.ubuntu.com/ubuntu xenial-security InReleasedn't create tempfiles for splitting up /var/lib/apt/lists/partial/security.ubuntu.com_ubuntu_dists_xenial-security_InRelease
Ign:3 http://si.archive.ubuntu.com/ubuntu xenial-updates InReleasetempfiles for splitting up /var/lib/apt/lists/partial/si.archive.ubuntu.com_ubuntu_dists_xenial-updates_InRelease
Get:4 http://si.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]
Ign:4 http://si.archive.ubuntu.com/ubuntu xenial-backports InReleaseup /var/lib/apt/lists/partial/si.archive.ubuntu.com_ubuntu_dists_xenial-backports_InRelease
Fetched 553 kB in 0s (1,402 kB/s)
Error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ExecFailed: Cannot launch daemon, file not found or permissions invalid
Reading package lists... Done
W: GPG error: http://si.archive.ubuntu.com/ubuntu xenial InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: The repository 'http://si.archive.ubuntu.com/ubuntu xenial InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://security.ubuntu.com/ubuntu xenial-security InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: The repository 'http://security.ubuntu.com/ubuntu xenial-security InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://si.archive.ubuntu.com/ubuntu xenial-updates InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: The repository 'http://si.archive.ubuntu.com/ubuntu xenial-updates InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://si.archive.ubuntu.com/ubuntu xenial-backports InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: The repository 'http://si.archive.ubuntu.com/ubuntu xenial-backports InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.