On Thursday 29 August 2019 18:10:19 Alexander Dalloz wrote: > > 2019-08-29 17:23:18,117 exception: [Errno 14] curl#60 - "Peer's > > Certificate issuer is not recognized." > > 2019-08-29 17:23:18,117 retrycode (14) not in list [-1, 2, 4, 5, 6, > > 7], re-raising > > [ ... ] > > > Cannot retrieve metalink for repository: epel/x86_64. Please verify > > its path and try again > > So can we check what version of the ca-certificates packages is being > installed on your system? > > And a check into a different direction: what's the date and time of that > system? Does it fit or is it wrong? Time being not accurate can make SSL > connections fail. Firstly, thank you for you help with this Alexander. I had already checked the system time. It was about 3 minutes out, but I fixed it anyway. I have checked the RPM for the certificates, and it matches the one on another box that works. [root at stan2 ~]# date Fri 30 Aug 09:45:27 BST 2019 [root at stan2 ~]# rpm -qa|grep cert ca-certificates-2018.2.22-70.0.el7_5.noarch [root at stan2 ~]#