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So a tool just told me that two of my SSL certificates expired, namely: /etc/ssl/certs/ca-certificates.crt and /etc/ssl/certs/ssl-cert-snakeoil.pem.

What should I do to fix this problem? Remove those certificates? If so how? I'm using Debian 9.1 with KDE.

  • Note that that certificate is created by Debian's ssl-cert package. – artfulrobot Mar 22 at 10:48
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There should be a "ca-certificates" package on your distro's package repository.

Upgrade that package and your installed CA certificates will be upgraded.

Btw, if you remove ca-certificates.crt from your system, you won't be able to trust anyone's SSL certificate.

  • It's already the latest version of the official Debian repositories but I still get that warning! – mYnDstrEAm Aug 24 '17 at 23:25
  • Which version of Debian are you using? – Pablo Recalde Aug 25 '17 at 0:52
  • The latest one: 9.1. (No particular distribution but the original Debian from the official website installed from DVD.) – mYnDstrEAm Aug 25 '17 at 11:43
  • Try with command update-ca-certificates – Pablo Recalde Aug 25 '17 at 18:06
  • This doesn't seem to work. The output of sudo update-ca-certificates is: Updating certificates in /etc/ssl/certs... 0 added, 0 removed; done. Running hooks in /etc/ca-certificates/update.d... done. Updating Mono key store Linux Cert Store Sync - version 4.6.2.0 Synchronize local certs with certs from local Linux trust store. Copyright 2002, 2003 Motus Technologies. Copyright 2004-2008 Novell. BSD licensed. I already trust 166, your new list has 166 Import process completed. Done done. and I still get that warning. – mYnDstrEAm Aug 28 '17 at 11:36

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