openssl for ssl certs

openssl can work well with ssl certs.

the following links explains the following points in detail:

• create private keys (domain.key)
• create certificate requests (domain.csr)
• create certificates (domain.crt)
• view certificates
• converting certificate formats (PEM<->DER<->PKCS7<->PKCS12)

other useful cmds:

• checking the remote cert:
  [code] $ openssl s_client -servername example.com -connect example.com:443 | openssl x509 -text
  $
  [/code]

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link: digitalocean.com