If you would like to check the ssl encryption type on a cert you can use the following command.
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Note: Replace lukeslinux.co.uk:443 with your website and ssl port. 
\\
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<sxh bash>
openssl s_client -connect lukeslinux.co.uk:443 < /dev/null 2>/dev/null | openssl x509 -text -in /dev/stdin | grep "Signature Algorithm"
</sxh>