ttf-mscorefonts-installer 无法安装，解决办法
Ubuntu更新时，弹出安装ttf-mscorefonts-installer，
Failure to download extra data files
The following packages requested additional data downloads after package installation, but the data could not be downloaded or could not be processed.
ttf-mscorefonts-installer
The download will be attempted again later, or you can try the download again now. Running this command requires an active Internet connection.
但安装总是失败，
使用命令行 sudo apt-get --purge --reinstall install ttf-mscorefonts-installer
提示下载文件有404错误：ttf-mscorefonts-installer: processing...
ttf-mscorefonts-installer: downloading http://downloads.sourceforge.net/corefonts/andale32.exe
Err:1 http://downloads.sourceforge.net/corefonts/andale32.exe
404 Not Found
E: Failed to fetch https://nchc.dl.sourceforge.net/project/corefonts/the fonts/final/andale32.exe 404 Not Found
解决办法：
wget http://httpredir.debian.org/debian/pool/contrib/m/msttcorefonts/ttf-mscorefonts-installer_3.6_all.deb
sudo dpkg -i ttf-mscorefonts-installer_3.6_all.deb