hi i just installed Centos7 and i want to install yum but i get the following message
Cannot find valid baseurl for repo: base/7/x86_64

and

One of the configured repositories failed (uknown)

thank you for you help

What are you using to install yum? Yum should already be installed.

i typed in sudo yum install wget

error came up

What was the error that came up?

Try typing in:
Than try:
If your repo is not right; look here:
https://www.centos.org/forums/viewtopic.php?t=54100

its like i don't have any packages installed.

[root@ltgit2 etc]# yum install wget
Loaded plugins: fastestmirror
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...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. 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 <repoid>

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=<repoid>.skip_if_unavailable=true

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

[root@ltgit2 etc]# yum install wget
Loaded plugins: fastestmirror
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...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. 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 <repoid>

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=<repoid>.skip_if_unavailable=true

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

what is the output of the following command:

1 members found this post helpful.

Like lazydog said; yum should be installed.

http://superuser.com/questions/97509...um-on-centos-7
http://tecadmin.net/top-5-yum-reposi...rhel-systems/#

Could be an DNS issue?
https://www.centos.org/forums/viewtopic.php?t=56113

http://vault.centos.org/4.2/CentOS-Base.repo

HTH

[gituser@ltgit2 etc]$ yum repolist
Loaded plugins: fastestmirror
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...as&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...es&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
repo id repo name status
base/7/x86_64 CentOS-7 - Base 0
extras/7/x86_64 CentOS-7 - Extras 0
updates/7/x86_64 CentOS-7 - Updates 0
repolist: 0
[gituser@ltgit2 etc]$

i have the dns configured. but strange.,. it pings 8.8.8.8 but not name resolution google.com

Can you ping mirrorlist.centos.org?

https://www.centos.org/forums/viewtopic.php?t=52756

-::-Wait to hear what lazydog thinks about this.-::-

Then DNS is not working. How did you set it up? What does your network configuration look like?

Your error has nothing to do with yum or package management and has everything to do with domain name resolution. The yum errors you've been getting are quite clear on that: "Could not resolve host: mirrorlist.centos.org". I don't know how that could be misinterpreted to mean that yum is not installed, or that you don't have any packages installed.

1 members found this post helpful.

when you put it like that.. you are right. i apologize.

i am new at this and didn't understand.

It is defiantly a resolver problem.

What does your /etc/resolv.conf file look like? Use [ code ] tags when posting output to keep it clean

What is returned when you run the following:

The above will just check if you are able to resolve anything and should look something like: