如果我使用，apt-get install git我会收到以下错误：
Err:1 http://ports.ubuntu.com/ubuntu-ports xenial-security/main armhf git- man all 1:2.7.4-0ubuntu1.3 404 Not Found [IP: 91.189.88.150 80]
Err:2 http://ports.ubuntu.com/ubuntu-ports xenial-security/main armhf git armhf 1:2.7.4-0ubuntu1.3 404 Not Found [IP: 91.189.88.150 80]
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/g/git/git-man_2.7.4-0ubuntu1.3_all.deb 404 Not Found [IP: 91.189.88.150 80]
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/g/git/git_2.7.4-0ubuntu1.3_armhf.deb 404 Not Found [IP: 91.189.88.150 80]
当我安装任何其他软件包时会抛出类似的错误。
我一直在更改我的sources.list文件，但似乎没有任何帮助。
这是我的sources.list文件的内容：
deb http://ports.ubuntu.com/ubuntu-ports/ xenial main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports/ xenial main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports/ xenial-updates main restricted …