PROBLEM WITH UPDATE AND UPGRADE LINUX DEBIAN
PROBLEM :
W: GPG error: http://ppa.launchpad.net precise Release: The following signatures were invalid: BADSIG FAEB83059BD4ED25 Launchpad Trimage
W: GPG error: http://ppa.launchpad.net precise Release: The following signatures were invalid: BADSIG 7FB8BEE0A1F196A8 Launchpad PPA for Pidgin Developers
W: GPG error: http://archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/download.ebz.epson.net_dsc_op_stable_debian_dists_lsb3.2_main_binary-amd64_Packages
E: The package lists or status file could not be parsed or opened.
ANSWER :
sudo apt-get clean
cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get clean
sudo apt-get update
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