On Friday 30 August 2019 16:04:51 Gordon Messmer wrote: > On 8/30/19 5:52 AM, Gary Stainburn wrote: > > Incidentally, the*good* server that I was referencing my broken server against has decided to start giving the curl certificate errors in the same way that the broken one did. Very strange. I ran > > > It's possible that the error is unrelated to the ca-certificates file. > You'll only see it if yum selects a mirror that uses a Let's Encrypt or > Amazon-signed certificate (at least, those were the CAs for the hosts I > saw you report errors for). If yum happens to select mirrors that > don't, then everything will work normally. Reinstalling the package on > the original system may have been coincidental. Hi Gordon, That would make a great deal of sense, and fits in with the external influence which would explain why it's suddenly appearing on both servers. However, when I re-installed ca-certificates it immediately fixed the problem on both boxes, which implies an internal problem. Gary