| [root@iZ2ze8d3jgsseswg83vkbzZ wyshn]# chmod +x /www/server/panel/certbot-auto && /www/server/panel/certbot-auto -n Upgrading certbot-auto 0.12.0 to 0.14.1...
 Replacing certbot-auto...
 /root/.local/share/letsencrypt/lib/python2.6/site-packages/cryptography/__init__.py:26: DeprecationWarning: Python 2.6 is no longer supported by the Python core team, please upgrade your Python. A future version of cryptography will drop support for Python 2.6
 DeprecationWarning
 Saving debug log to /var/log/letsencrypt/letsencrypt.log
 Missing command line flags. For non-interactive execution, you will need to specify a plugin on the command line.  Run with '--help plugins' to see a list of options, and see https://eff.org/letsencrypt-plugins for more detail on what the plugins do and how to use them.
 
 
 按照这个提示安装不了,怎么办呀?
 
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