January 30, 2020, sudo website reported the sudo tool of a high-risk holes, hole Numbers for: CVE - 2019-18634, hackers can use tools for Linux root (root has the highest authority of the Linux operating system, complete solution:

Upgrade system sudo, 1.8.31 above can upgrade to the latest version.
I download to 99% when the error, what reason? This kind of download speed is always slow!!!!!