Ubuntu 输入 apt-get update , 产生Hash Sum mismatch

[root]$ sudo apt-get update

W: Failed to fetch http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/dists/trusty/main/binary-i386/Packages Hash Sum mismatch

W: Failed to fetch http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/dists/trusty/main/i18n/Translation-en Hash Sum mismatch

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