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Oracle Linux: Command 'yum install' Fails with "error was [Errno 14] curl#5 - "Could not resolve proxy: https; Unknown error" (Doc ID 2496163.1)

Last updated on JUNE 01, 2020

Applies to:

Linux OS - Version Oracle Linux 6.0 and later
Linux x86-64
Linux x86


Server is registering to ULN via command below:

# uln_register --proxy=https://<IP>:<PORT> --proxyUser=XXXX --proxyPassword=YYYY

After registering the Oracle Linux server to ULN, running yum command to install any RPM package fails:

#yum install uln-yum-mirror
Loaded plugins: langpacks, rhnplugin, ulninfo
This system is receiving updates from ULN.

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>
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

yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

failed to retrieve repodata/repomd.xml from ol7_x86_64_UEKR5
error was [Errno 14] curl#5 - "Could not resolve proxy: https; Unknown error"


But in /etc/yum.conf, proxy is defined.


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