有台ubuntu好久沒update了
今天要update時出現以下的訊息

W: GPG error: http://tw.archive.ubuntu.com trusty Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/tw.archive.ubuntu.com_ubuntu_dists_trusty_main_i18n_Translation-en
E: The package lists or status file could not be parsed or opened.

看來好像是list有問題
找了下一下資料
用以下的方法處理後就ok了

cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get update