Error: Cannot retrieve repository metadata (repomd.xml) for repository: epel. Please verify its path and try again
I tried installing EPEL on a fresh install of RHEL6, and after adding the repo, yum fails with the above error. I have RHEL6.1 (Santiago) and get the above error.
This happens because the RHEL/CentOS installation doesn’t trust the HTTPS certificate used by mirrors.fedoraproject.org, that is issued by “GeoTrust SSL CA“.
In my case the package ca-certificates was not installed and the /etc/pki/tls/certs/ folder didn’t contain any ca-bundle.crt or ca-bundle.trust.crt !
Solution: yum install ca-certificates
(I had to temporarily rpm –erase epel-release first, to get yum working again)
I once got the same error message eventhout ca-certificates was installed and up to date. Then it was a firewall blocking https (port 443) traffic.
I worked around that by changing from https to http in /etc/yum.repos.d/epel.repo
Sometimes you have a tiny file you wish to include in a block of plain text, perhaps an email. When I was young(er), -in the era of UUCP and modems, before the world wide web and HTML were invented, when RFC-821 was still new, -there were no MIME attachments to email.
If you wanted to send a file by mail, you had to encode it in a way that could be included in plain text without breaking. That meant 7-bit ASCII only, max 72 chars on each line, and a lot of other limitations.
Bandwidth and storage were limited, so uuencode was invented to “efficiently” encode 3 bytes of binary data into 4 printable characters. Pretty clever.
I recently had a need for uuencode, and it was not installed on my CentOS/RedHat system by default. The package containing uuencode is called “sharutils”. The name comes from the “shar” utility to encode binaries into a shell script, shell archive (shar file).
“yum install sharutils” – and voila, I have uuencode and uudecode available.