➜  letsencrypt git:(master) sudo certbot
Saving debug log to /var/log/letsencrypt/letsencrypt.log

Which names would you like to activate HTTPS for?
We recommend selecting either all domains, or all domains in a VirtualHost/server block.
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1: zhangmin.name
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Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel): 
Certificate not yet due for renewal

You have an existing certificate that has exactly the same domains or certificate name you requested and isn't close to expiry.
(ref: /etc/letsencrypt/renewal/zhangmin.name.conf)

What would you like to do?
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1: Attempt to reinstall this existing certificate
2: Renew & replace the certificate (may be subject to CA rate limits)
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Select the appropriate number [1-2] then [enter] (press 'c' to cancel): 2
Renewing an existing certificate for zhangmin.name

Successfully received certificate.
Certificate is saved at: /etc/letsencrypt/live/zhangmin.name/fullchain.pem
Key is saved at:         /etc/letsencrypt/live/zhangmin.name/privkey.pem
This certificate expires on 2025-08-21.
These files will be updated when the certificate renews.
Certbot has set up a scheduled task to automatically renew this certificate in the background.

Deploying certificate
Successfully deployed certificate for zhangmin.name to /etc/nginx/sites-enabled/default
Your existing certificate has been successfully renewed, and the new certificate has been installed.

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If you like Certbot, please consider supporting our work by:
 * Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
 * Donating to EFF:                    https://eff.org/donate-le
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