Added details on generating .pvk for linux using LetsEncrypt certificates

SSL.md

@@ -30,7 +30,7 @@ At this time newer SSL technologies are not supported by mono and some browsers
 - `.pvk` certificate, this can be done by converting a `.key` and `.cert`
 - *Windows PC/VM*. The conversion tool only works there. OpenSSL 1.0.0 and up should be able to do it, but it needs to be done without a pass phrase, currently (version 1.0.1l) this is not possible.
 
-### Converting key/cert to pvk
+### Converting key/cert to pvk on windows
 
   1. Download the [PVK Conversion Tool](http://www.drh-consultancy.demon.co.uk/pvk.html) (near the bottom) and extract it.
 
@@ -38,6 +38,16 @@ At this time newer SSL technologies are not supported by mono and some browsers
 
      `pvk.exe -in yourdomain.key -topvk -nocrypt -out yourdomain.pvk`
 
+### LetsEncrypt Support - Converting key/cert to pvk on linux
+
+1. Using OpenSSL >1.0.0 it should be possible to generate a .pvk using a .pem from LetsEncrypt
+
+openssl rsa -in privkey.pem -outform PVK -pvk-none -out sonarr.pvk
+
+2. You will also need to generate a .cert from .pem
+
+openssl x509 -inform PEM -in cert.pem -outform DER -out sonarr.cert
+
 ### Synology Only
 _If you're not running Sonarr on a Synology, skip these steps_