Check SSL Certificate Info via Linux/macOS Command Line

.bash_profile

# You can place this into '.bash_profile' to make it more accessible.

# sslstatus google.com:443

sslstatus()
{
    echo
    a=(${1//:/ })
    PORT=443
    if [ "${#a[@]}" -ne 2 ]; then
        if [ "${#1}" -lt 1 ] || [[ "$1" =~ ":" ]]; then
            echo "usage: ${0} HOST[:PORT]"
            echo
            echo "Note: If PORT was not provied, ${PORT} will be used by default."
            return;
        fi
    else
        PORT=(${a[1]})
    fi
    HOST=(${a[0]})
    echo "Checking SSL Cert on host \"${HOST}\" for port ${PORT}..."
    echo
    echo | openssl s_client -servername "${HOST}" -connect "${HOST}:${PORT}" 2>/dev/null | openssl x509 -noout -issuer -subject -email -dates -pubkey -fingerprint
}