Today I tried executed the command: apt-get update. But there seems to be a problem, because I get error-messages like these:
Err trusty/main Sources
server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
Err trusty/restricted Sources
server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
etc. And then:
W: Failed to fetch server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
W: Failed to fetch server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
etc.
I guess this problem is because I don't have a file called 'ca-certificates.crt' in that folder. I looked also on another server with Ubuntu 14.04 on it, but this certicate file doesn't excist there either. So, where can I find/download this crt-file?
I hope someone can help me.
Thanks, Kevin
1 Answer
Their certificate is invalid as of the other day - they forgot to renew their SSL Certificate
Simply visiting the URL with Firefox and checking the certificate warning shows you this.
mirror.umd.edu uses an invalid security certificate.
The certificate expired on 19/04/17 13:00.
The current time is 21/04/17 14:31.
You can either
- wait a bit
- Change repository
- Change the URLs in your apt sources to
http://(safe enough fi GPG signing is performed) - Set
Verify-Peerin yourapt.confsettings tofalse(not recommended as a set-and-forget solution)
