使用 letsencrypt

• 获取代码

  git clone https://github.com/certbot/certbot
  

• 生成证书

    ./certbot-auto certonly --standalone --email [email protected] -d www.example.com -d example.com
  

  成功后的输出：

  IMPORTANT NOTES:
   - Congratulations! Your certificate and chain have been saved at:
     /etc/letsencrypt/live/wangsijie.me/fullchain.pem
     Your key file has been saved at:
     /etc/letsencrypt/live/wangsijie.me/privkey.pem
     Your cert will expire on 2019-08-04. To obtain a new or tweaked
     version of this certificate in the future, simply run certbot-auto
     again. To non-interactively renew *all* of your certificates, run
     "certbot-auto renew"
   - 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
  

  如果出现下面的错误，请先关闭占用了 80 端口的程序

  Problem binding to port 80: Could not bind to IPv4 or IPv6.
  

• NGINX 配置 SSL

  server {
      listen 443;
      server_name wangsijie.me;
    
      root /var/www/blogs;
    
      ssl on;
      ssl_certificate /etc/letsencrypt/live/wangsijie.me/fullchain.pem;
      ssl_certificate_key /etc/letsencrypt/live/wangsijie.me/privkey.pem;
      ssl_ciphers "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
      ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
      ssl_prefer_server_ciphers on;
      ssl_session_cache shared:SSL:10m;
      ssl_stapling on;
      ssl_stapling_verify on;
      ... ...
      ... ...
   }
  

matplotlib 中文显示

#coding:utf-8
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif']=['SimHei']
plt.rcParams['axes.unicode_minus']=False

后续的中文显示使用 unicode标记

u'测试'

2019 春雪

2019 年春天下了两场雪，一场下了一白天，一场下了一黑夜

FFMPEG 常用命令

打印视频帧类型

ffprobe -select_streams v -show_frames -show_entries frame=pict_type -of csv input

ffprobe -select_streams v -show_frames -show_entries frame=pict_type -of csv input | grep -n I

Remove Gerrit Group

Gerrit UI 上无法删除已建立的组，所有需要从 Command Line 操作：

1. 查询组是否存在

   ssh -p port [email protected]  gerrit ls-groups -q DemoGroup
   

2. 删除 Gerrit 组

   ssh -p port [email protected]  gerrit gsql
   

   gerrit> delete from ACCOUNT_GROUP_NAMES where name='DemoGroup';
   

   gerrit> delete from ACCOUNT_GROUPS where name='DemoGroup';