How to export a certificate from a cert8.db file to a certificate file in PEM format?

If you want to export a certificate from the "cert8.db" file created by Firefox 9 into a certificate file in PEM format, you can use the Mozilla "certutil -L -n -a" command as shown in this tutorial:

C:\fyicerter>\fyicerter\nss\bin\certutil -L 
-d C:\Users\fyicenter\AppData]Roaming\Mozilla\Firefox\Profiles\xxxx.default
-n "GeoTrust SSL CA" -a > GeoTrust.pem

C:\fyicerter>type GeoTrust.pem

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

What you are getting from this tutorial:

• '-a' specifies that output certificate file to be Base64 encoded into ASCII characters.