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Yumrepo error of CentOS 6 Yum installation software

[root@665daec6fea1 ~]#  yum install aprLoaded plugins: fastestmirror, ovlSetting up Install ProcessLoading mirror speeds from cached hostfileYumRepo Error: All mirror URLs are not using ftp, http[s] or file. Eg. Invalid release/repo/arch combination/removing mirrorlist with no valid mirrors: /var/cache/yum/x86_64/6/base/mirrorlist.txtError: Cannot find a valid baseurl for repo: base
cd /etc/yum.repos.dcp CentOS-Base.repo CentOS-Base.repo.oldvi CentOS-Base.repo

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[base]name=CentOS-$releasever - Base# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra# baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/baseurl=https://vault.centos.org/6.10/os/$basearch/gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
# released updates[updates]name=CentOS-$releasever - Updates# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra# baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/baseurl=https://vault.centos.org/6.10/updates/$basearch/gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
# additional packages that may be useful[extras]name=CentOS-$releasever - Extras# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra# baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/baseurl=https://vault.centos.org/6.10/extras/$basearch/gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

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yum clean allyum clean metadatyum update

------------------yum Error--------------

Loaded plugins: fastestmirror, langpacks, priorities

Determining fastest mirrors

Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was

14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

 One of the configured repositories failed (Unknown),

 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=<repoid> ...

     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 <repoid>

        or

            subscription-manager repos --disable=<repoid>

     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=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: Webmin

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[root@myserver]# ONBOOT=no

[root@myserver]# dhclient

[root@myserver]# yum update

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yum clean all --enablerepo=*

eventually if needed

rm -rf /var/cache/yum/x86_64/7/*

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