YUM tips

There are general YUM options, such as logfile, which lists the location of YUM logs, and plugins, which enables the use of YUM plug-ins like presto. Packages are downloaded to the directory specified with the cachdir option, in this case, /var/cache/yum.  That can be copied before applying if you invoke yum without -y option.

You can elect to keep the downloaded packages or have them removed after they are installed. The tolerant option allows for package-install errors, and the retries option specifies the number of times to try to access a package.

Both exactarch and obsoletes apply to YUM updating procedures, invoked with the YUM update command.

The obsoletes option is used for distribution-level updates, and exactarch will only update packages in your specific architecture, such as i386 instead of i686. gpgcheck is a repository option that is set globally for the repo files. It checks for GPG software signatures.

NEWS CONTENTS

• 20171206 : rpm - yum error Cannot retrieve metalink for repository epel. Please verify its path and try again updating ContextBroker - ( Dec 06, 2017 , stackoverflow.com )

Old News ;-)

[Dec 06, 2017] rpm - yum error Cannot retrieve metalink for repository epel. Please verify its path and try again updating ContextBroker -

Dec 06, 2017 | stackoverflow.com

JosepB ,Nov 4, 2014 at 12:08

I'm trying to update Orion ContextBroker using the command yum install contextBroker. Unfortunatelly I get the following error:

Loaded plugins: fastestmirror, refresh-packagekit, security Loading

mirror speeds from cached hostfile

Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

What could be going wrong ?

fgalan ,Nov 4, 2014 at 12:51

I solved this issue editing both /etc/yum.repos.d/epel.repo and /etc/yum.repos.d/epel-testing.repo files, commenting all entries starting with mirrorlist=... and uncommenting all the entries starting with baseurl=... .

XoR ,Dec 27, 2014 at 12:12

You just needed to update ca-certificates package. Before that just disable all repos with https that are failing. That's why solution with commenting mirrorlist or using http instead https would work also.

For example if you need to disable only epel repo:

yum --disablerepo=epel -y update  ca-certificates

This will also help wget, curl, and anything else that uses SSL certificates.

Horatio Alderaan ,Jan 23, 2015 at 0:22

This should be accepted as the correct answer, as it diagnoses the real source of the problem, rather than just providing a work-around. – Horatio Alderaan Jan 23 '15 at 0:22

TrinitronX ,Jan 26, 2015 at 5:31

I've tested this on the CentOS 6.5 bento box and it does make things slightly more reliable when running yum clean all && yum makecache . However, it still fails sometimes. Adding a retry to my script made it even more reliable. I suspect that some mirrors are unreliable and a retry can give another mirror that works. So if at first it doesn't succeed, try try again! – TrinitronX Jan 26 '15 at 5:31

Stéphane ,Mar 10, 2015 at 13:44

Wonder how you found that solution ... the error message was quite criptic for me – Stéphane Mar 10 '15 at 13:44

XoR ,Mar 10, 2015 at 15:45

Well this comes from experience, and yes, message is cryptic :) – XoR Mar 10 '15 at 15:45

Ekramul Hoque ,Apr 11, 2016 at 18:44

Thanks for nice answer – Ekramul Hoque Apr 11 '16 at 18:44

sumit pandit ,Jan 12, 2015 at 12:23

use this command:

sudo sed -i "s/mirrorlist=https/mirrorlist=http/" /etc/yum.repos.d/epel.repo

or alternatively use command

vi /etc/yum.repos.d/epel.repo

go to line number 4 and change the url from

mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch

to

mirrorlist=http://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch

Joseph N. ,Nov 23, 2014 at 15:37

For my case commenting out mirrorlist and uncomenting entries with baseurl din't work. I noticed the problem was with the https iniside the .repo fedora files. I solved it by going in /etc/yum.repository.d and replacing all https with http in different .repo files. That worked!!

Rashad Saif ,May 3, 2016 at 9:54

Check if you access internet throw proxy then you have to add internet proxy address to yum configuration .

add

proxy=http://ip:port to /etc/yum.conf

Markus ,Aug 11 at 7:06

make sure to have the https proxy also specified. – Markus Aug 11 at 7:06

how to i start ,Feb 4, 2015 at 6:28

I solved this problem by this solution.

you just change in this file /etc/yum.repos.d/epel.repo

mirrorlist= change this url https to http

baseurl= change this url https to http

bummi ,Feb 4, 2015 at 8:08

Please take a look at stackoverflow.com/help/promotion – bummi Feb 4 '15 at 8:08

Nabeel Ahmed ,Dec 2, 2016 at 7:34

You may come across this message/error, after installing epel-release. The quick fix is to update your SSL certificates:

yum -y upgrade ca-certificates

Chances are the above error may also occur while certificate update, if so, just disable the epel repo i.e. use the following command:

yum -y upgrade ca-certificates --disablerepo=epel

Once the certificates will be updated, you'll be able to use yum normally, even the epel repo will work fine. In case you're getting this same error for a different repo, just put it's name against the --disablerepo=<repo-name> flag.

---

Note : use sudo if you're not the root user.

qingbo ,Aug 3 at 5:10

That's the best answer for me :) – qingbo Aug 3 at 5:10

Howard Lee ,Jun 30, 2016 at 17:39

For boxes that does not have internet access, you can remove epel repository:

yum remove epel-release --disablerepo=epel

This happened to me as I accidentally installed epel-release using rpm on a prod box.

Laxman S ,Nov 27, 2014 at 14:06

I solved it by going in /etc/yum.repository.d/. For my case i comment out mirrorlist and uncomenting entries with baseurl. as well as added sslverify=false.

https://serverfault.com/questions/637549/epel-repo-for-centos-6-causing-error

dagelf ,Mar 24, 2015 at 7:07

Not only that, but also changing the URLs to archives.fedoraproject.org/pub/archive/fedora/linux/releases‌​/ (for fedora.repo and fedora-updates.repo). Note the "archives" in front and the "pub/archive" in the path) – dagelf Mar 24 '15 at 7:07

Fabricio ,Apr 13, 2015 at 14:26

I've workaround this issue by changing the https entries in epel.repo file to http.

Sam ,Jun 26, 2015 at 6:09

I guess this should work. I solved my problem with this.

$ sudo yum clean all

$ sudo yum --disablerepo="epel" update nss

Beavus Slagerty ,Mar 5, 2015 at 20:20

All of the above did not work for me, but a rebuild of the rpm database, with the following command, did:

sudo rpm --rebuilddb

Thanks all for the help.

Anil Reddy ,Apr 19, 2016 at 20:26

Changing the mirrorlist URL from https to http fixed the issue for me.

Futur'Fusionneur ,Oct 30 at 22:38

Fixed mine like this:

yum install elfutils-default-yama-scope-0.168-8.el7.noarch --disablerepo=epel
yum install nss-pem -disablerepo=epel
yum reinstall ca-certificates --disablerepo=epel
yum clean all
rm -rf /var/cache/yum
yum update`

,

Walkthrough Steps

Running the following command will update the repo to use HTTP rather than HTTPS:

sudo sed -i "s/mirrorlist=https/mirrorlist=http/" /etc/yum.repos.d/epel.repo

You should then be able to update with this command:

yum -y update

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