执行该tlmgr update --all命令会返回相当神秘的错误消息：
/usr/local/bin/tlmgr: checksum error when downloading /tmp/NAmys4kViD/eBXC4uTwZY
from ftp://sunsite.icm.edu.pl/pub/CTAN/systems/texlive/tlnet/tlpkg/texlive.tlpdb:
digest disagree
几天前，我成功安装了 Texlive 2016 发行版，并且它可以正常运行（我可以编译简单的 LaTeX 文档）。我该如何修复它？
以下是输出tex --version：
TeX 3.14159265 (TeX Live 2016)
kpathsea version 6.2.2
Copyright 2016 D.E. Knuth.
There is NO warranty. Redistribution of this software is
covered by the terms of both the TeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the TeX source.
Primary author of TeX: D.E. Knuth.