Linux/Apache/mod_ssl.md
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@@ -616,6 +616,13 @@ easy_install --upgrade pip
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pip install --upgrade pyOpenSSL
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```
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+## ImportError: 'pyOpenSSL' module missing required functionality. Try upgrading to v0.14 or newer.
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+- [ImportError: 'pyOpenSSL' module missing required functionality. Try upgrading to v0.14 or newer. · Issue #5534 · certbot/certbot · GitHub](https://github.com/certbot/certbot/issues/5534#issuecomment-375740569)
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+```
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+pip uninstall -y requests six urllib3
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+yum reinstall -y python-requests python-six python-urllib3
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+```
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+
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# リンク
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- [Let's Encrypt](https://letsencrypt.org/) Free SSL/TLS Certificates
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- [Certbot](https://certbot.eff.org/) / [GitHub:certbot/certbot](https://github.com/certbot/certbot)