Установка MySQL в Red Hat Linux с использованием замазки SSH

Я попробовал следующие команды из этой ссылки, чтобы установить MySQL на Red Hat Linux на удаленном сервере с помощью Putty.

sudo yum localinstall mysql57-community-release-el6-11.noarch.rpm

эта команда прошла успешно.

Затем выполните эту команду - sudo yum install mysql-community-server, выбросив эту ошибку -

Loaded plugins: langpacks, product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
itc                                                                                                                                              | 4.1 kB  00:00:00
http://repo.mysql.com/yum/mysql-connectors-community/el/6/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: repo.mysql.com; Unknown error"
Trying other mirror.


 One of the configured repositories failed (MySQL Connectors Community),
 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. Disable the repository, 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 mysql-connectors-community

     4. 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=mysql-connectors-community.skip_if_unavailable=true

failure: repodata/repomd.xml from mysql-connectors-community: [Errno 256] No more mirrors to try.
http://repo.mysql.com/yum/mysql-connectors-community/el/6/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: repo.mysql.com; Unknown error"

Также, когда я запускаю this-

wget https://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

Получение этой ошибки -

https://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
Resolving repo.mysql.com... failed: Name or service not known.
wget: unable to resolve host address "repo.mysql.com"

Может кто-то, пожалуйста, помогите мне решить эту проблему? Благодарю.