Verifying Let's Encrypt certificates via command line

LE-cert-verification-commands.sh

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#Commands to check Let's Encrypt certificates status after renew
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#Concise - Its output is the expire date
echo | openssl s_client -connect blog.immontilla.eu:443 2>/dev/null | openssl x509 -noout -enddate

#Certificate main fields (subject, start date, expire date, issuer and status)
curl -v https://blog.immontilla.eu 2>&1 | awk 'BEGIN { cert=0 } /^\* SSL connection/ { cert=1 } /^\*/ { if (cert) print }'

#(sh) Full verbose
echo | openssl s_client -showcerts -servername blog.immontilla.eu -connect blog.immontilla.eu:443 2>/dev/null | openssl x509 -inform pem -noout -text

#(Java) Full verbose
keytool -printcert -sslserver blog.immontilla.eu:443