Sunday, 11 August 2024

How to disable Yum Repository.

 As the Centos-7 license has expired officially there are no mirror lists available so here is a solution given below if you are getting the error while downloading something in centos-7 in yum.( http://mirrorlist.centos.org )


CentOS 7 Cannot find a valid baseurl for repo: base/7/x86_64 


Error
====

[root@localhost /]# yum install wget
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
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: base/7/x86_64
[root@localhost /]#


As of today(11th August 2024), http://mirrorlist.centos.org is not up anymore.

if you still want to use the  CentOs 7 then you need  to go to .repo files in the directory /etc/yum.repos.d and  comment out all the mirrorlist lines and uncomment all the baseurl lines.

So for  CentOs version 8 and below you will also need to change from mirror.centos to vault.centos in the baseurl lines as they are deprecated.

Old Config.
======================

[root@localhost /]# vi /etc/yum.repos.d/CentOS-Base.repo
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[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/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#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/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#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/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

New Config.(Uncomment all Base URL REpo & comment all mirror lists.) and also you have to change need to change from mirror.centos to vault.centos in the baseurl lines as they are deprecated.

=====================================


[root@localhost /]# vi /etc/yum.repos.d/CentOS-Base.repo
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
baseurl=http://vault.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
baseurl=http://vault.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#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://vault.centos.org/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
baseurl=http://vault.centos.org/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7





Now the repos has been edited and now you need to clean the yum and try to install the packages whatever you want.

[root@localhost /]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up list of fastest mirrors

[root@localhost /]# yum install wget
Loaded plugins: fastestmirror
Determining fastest mirrors
base                                                                                                                         | 3.6 kB  00:00:00
extras                                                                                                                       | 2.9 kB  00:00:00
updates                                                                                                                      | 2.9 kB  00:00:00
(1/4): extras/7/x86_64/primary_db                                                                                            | 253 kB  00:00:00
(2/4): base/7/x86_64/group_gz                                                                                                | 153 kB  00:00:00
(3/4): base/7/x86_64/primary_db                                                                                              | 6.1 MB  00:00:01
(4/4): updates/7/x86_64/primary_db                                                                                           |  27 MB  00:00:02
Resolving Dependencies
--> Running transaction check
---> Package wget.x86_64 0:1.14-18.el7_6.1 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================================================================
 Package                         Arch                              Version                                    Repository                       Size
====================================================================================================================================================
Installing:
 wget                            x86_64                            1.14-18.el7_6.1                            base                            547 k

Transaction Summary
====================================================================================================================================================
Install  1 Package

Total download size: 547 k
Installed size: 2.0 M
Is this ok [y/d/N]: y



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