sudo yum install erlang[Errno 14] HTTP Error 404 - Not Found
解决方法：
执行yum install erlang出现以下错误，后来我按照错误提示改成以下语句运行成功了：
sudo yum install erlang --disablerepo=erlang-solutions
或者
sudo yum install erlang --disablerepo=erlang-solutions ...
yum install gcc-c++ --disablerepo=erlang-solutions ...
错误信息：
[root@xxx ~]# yum install erlang
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
base | 3.1 kB 00:00:00
epel | 4.7 kB 00:00:00
http://packages.erlang-solutions.com/rpm/centos/2.1903/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
Trying other mirror.
One of the configured repositories failed (Centos 2.1903 - x86_64 - Erlang Solutions),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=erlang-solutions ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable erlang-solutions
or
subscription-manager repos --disable=erlang-solutions
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=erlang-solutions.skip_if_unavailable=true
failure: repodata/repomd.xml from erlang-solutions: [Errno 256] No more mirrors to try.
http://packages.erlang-solutions.com/rpm/centos/2.1903/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found