我在更新我的源列表时遇到了以下错误。
如何解决这个问题?
$ sudo apt-get update
Reading package lists... Done
W: GPG error: http://archive.debian.org lenny/updates Release: The following signatures were invalid: KEYEXPIRED 1356982504
W: You may want to run apt-get update to correct these problems
如何解决这个问题?