关于不能apt-ge updatet或Could not get lock /var/lib/dpk-灵析社区

参考：sudo apt-get update 错误解决方法 - timkyle_zhang - 博客园

关于Ubuntu中Could not get lock /var/lib/dpkg/lock解决方案_jiangjiane-CSDN博客

说明：

sudo apt-get update

错误如下：

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key <ftpmaster@ubuntu.com>

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release

W: Some index files failed to download. They have been ignored, or old ones used instead.

解决方法：

sudo rm -rf /var/lib/apt/lists/*
 
sudo apt-get update

或者：

sudo rm /var/lib/dpkg/lock
 
sudo dpkg --configure -a
 
sudo apt update

E: 无法获得 /var/lib/apt/lists/partial/cn.archive.ubuntu.com_ubuntu_dists_xenial-backports_InRelease 的状态 - pkgAcqTransactionItem::TransactionState-stat (2: 没有那个文件或目录)

方法二（亲测可以用）：

sudo rm /var/lib/apt/lists/lock