# APT:
sudo apt install certbot

# SNAP:
sudo snap install core
sudo snap refresh core
sudo snap install --classic certbot

sudo ln -s /snap/bin/certbot /usr/bin/certbot  # 这一步是为了确保 certbot 命令能全局使用

# CentOS/RHEL
sudo yum install epel-release
sudo yum install certbot

# MacOS
brew install certbot

sudo apt install python3.9-full pyhton3-pip
python3.9 -m pip install certbot
whereis certbot # 会弹出来certbot的可执行路径，这里以/usr/local/bin/certbot为例子
sudo ln -s /opt/certbot/bin/certbot /usr/bin/certbot

sudo certbot certonly -d *.example.com --manual --preferred-challenges dns --server https://acme-v02.api.letsencrypt.org/directory --key-type rsa

# 记得把example.com换成你自己的域名

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Enter email address (used for urgent renewal and security notices)
 (Enter 'c' to cancel): example@email.com # 这里填你的邮箱

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Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.4-April-3-2024.pdf. You must agree in
order to register with the ACME server. Do you agree?
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(Y)es/(N)o: y # 输入 Y

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Would you be willing, once your first certificate is successfully issued, to
share your email address with the Electronic Frontier Foundation, a founding
partner of the Let's Encrypt project and the non-profit organization that
develops Certbot? We'd like to send you email about our work encrypting the web,
EFF news, campaigns, and ways to support digital freedom.
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(Y)es/(N)o: y # 输入 Y
Account registered.
Requesting a certificate for *.example.com # 记得换成你的域名

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Please deploy a DNS TXT record under the name:

_acme-challenge.example.com # 这里需要设置域名解析，需要到域名后台填写信息

with the following value:

xxxxxxxxxxxxxxxxxxx # 这里是域名解析的内容

Before continuing, verify the TXT record has been deployed. Depending on the DNS
provider, this may take some time, from a few seconds to multiple minutes. You can
check if it has finished deploying with aid of online tools, such as the Google
Admin Toolbox: https://toolbox.googleapps.com/apps/dig/#TXT/_acme-challenge.example.com.
Look for one or more bolded line(s) below the line ';ANSWER'. It should show the
value(s) you've just added.

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Press Enter to Continue # 参考下图设置完域名解析后，按回车就可以生成了，记住一定要先解析设置完成后再回车

Successfully received certificate.
Certificate is saved at: /etc/letsencrypt/live/example.com/fullchain.pem
Key is saved at:         /etc/letsencrypt/live/example.com/privkey.pem
This certificate expires on 2025-05-04.
These files will be updated when the certificate renews.

NEXT STEPS:
- This certificate will not be renewed automatically. Autorenewal of --manual certificates requires the use of an authentication hook script (--manual-auth-hook) but one was not provided. To renew this certificate, repeat this same certbot command before the certificate's expiry date.

sudo cat /etc/letsencrypt/live/example.com/fullchain.pem # -----BEGIN CERTIFICATE----- # xxxxxxxxxxxxxxxxxx # -----END CERTIFICATE----- # -----BEGIN CERTIFICATE----- # xxxxxxxxxxxxxxxxxx # -----END CERTIFICATE-----

sudo cat /etc/letsencrypt/live/example.com/privkey.pem # -----BEGIN PRIVATE KEY----- # xxxxxxxxxxxxxxxxxx # -----END PRIVATE KEY-----