我同时启用了 80 和 443。
sudo certbot certonly --standalone --agree-tos --no-eff-email --staple-ocsp --preferred-challenges http -m **@**.com -d mycomp.com
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Requesting a certificate for mycomp.com
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Could not bind TCP port 80 because it is already in use by …