I tried updating using update manager and I got error saying requires installation of untrusted package.
I tried typing get update and get upgrade command in terminal but no avail.
but following shows the result after "get update" in terminal.
W: GPG error: http:// archive.canonical.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: GPG error: http:// archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: GPG error: http:// dell.archive.canonical.com precise-dell Release: The following signatures were invalid: BADSIG F9FDA6BED73CDC22 Canonical Archive Automatic Signing Key <ftpmaster@canonical.com>
Here is screen shot for your reference
I am a very new user to ubuntu. Please help and explain as if you are explaining a child.
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 40976EAF437D05B5,sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com F9FDA6BED73CDC22– Avinash Raj Mar 11 '14 at 15:46sudo apt-get updatecommand? – Avinash Raj Mar 11 '14 at 15:54apt-get clean
cd /var/lib/apt
mv lists lists.old
mkdir -p lists/partial
apt-get clean
apt-get update
– user256440 Mar 11 '14 at 16:31