Error: Error downloading packages in fedora, Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=updates-released-f25&arch=x86_64

Error: Error downloading packages: Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=updates-released-f25&arch=x86_64 [Could not resolve host: mirrors.fedoraproject.org]

$ sudo dnf install python

When installing python package, this error is raised (Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=updates-released-f25&arch=x86_64)

How to resolve could not resolve host name issue?

Try running this commands

$ sudo dnf clean all

$ sudo dnf upgrade

Check whether output of the upgrade command is 'Error: Failed to synchronize cache for repo 'fedora''

Try ping command for host mirrors.fedoraproject.org

$ ping mirrors.fedoraproject.org 

ping: mirrors.fedoraproject.org: Temporary failure in name resolution

Try few times if ping is not working and displayed as above and instead of getting reply.

PING wildcard.fedoraproject.org (67.219.144.68) 56(84) bytes of data.
64 bytes from 67.219.144.68 (67.219.144.68): icmp_seq=1 ttl=50 time=367 ms
64 bytes from 67.219.144.68 (67.219.144.68): icmp_seq=2 ttl=50 time=307 ms

Try upgrade command also few times if not working, sometimes connection with host 'mirrors.fedoraproject.org' might be temporarily failed.

$ sudo dnf upgrade

Upgrades all the packages.