我想通过在我的 centos 5.8 64 上执行 yum install 来安装软件包，但它返回 SSLError: unknow protocol。 我知道 centos 5.8 很古老，但目前我还没有选择升级。
这是错误：
Traceback (most recent call last):
File "/usr/bin/yum", line 29, in ?
yummain.user_main(sys.argv[1:], exit_code=True)
File "/usr/share/yum-cli/yummain.py", line 309, in user_main
errcode = main(args)
File "/usr/share/yum-cli/yummain.py", line 178, in main
result, resultmsgs = base.doCommands()
File "/usr/share/yum-cli/cli.py", line 345, in doCommands
self._getTs(needTsRemove)
File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs
self._getTsInfo(remove_only)
File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsInfo
pkgSack = self.pkgSack
File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 662, in <lambda>
pkgSack = property(fget=lambda self: self._getSacks(),
File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 502, in _getSacks
self.repos.populateSack(which=repos)
File "/usr/lib/python2.4/site-packages/yum/repos.py", line 260, in populateSack
sack.populate(repo, mdtype, callback, cacheonly)
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 168, in populate
if self._check_db_version(repo, mydbtype):
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 226, in _check_db_version
return repo._check_db_version(mdtype)
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 1226, in _check_db_version
repoXML = self.repoXML
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 1399, in <lambda>
repoXML = property(fget=lambda self: self._getRepoXML(),
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 1391, in _getRepoXML
self._loadRepoXML(text=self)
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 1381, in _loadRepoXML
return self._groupLoadRepoXML(text, ["primary"])
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 1365, in _groupLoadRepoXML
if self._commonLoadRepoXML(text):
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 1201, in _commonLoadRepoXML
result = self._getFileRepoXML(local, text)
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 974, in _getFileRepoXML
cache=self.http_caching == 'all')
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 811, in _getFile
http_headers=headers,
File "/usr/lib/python2.4/site-packages/urlgrabber/mirror.py", line 412, in urlgrab
return self._mirror_try(func, url, kw)
File "/usr/lib/python2.4/site-packages/urlgrabber/mirror.py", line 398, in _mirror_try
return func_ref( *(fullurl,), **kwargs )
File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 936, in urlgrab
return self._retry(opts, retryfunc, url, filename)
File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 854, in _retry
r = apply(func, (opts,) + args, {})
File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 922, in retryfunc
fo = URLGrabberFileObject(url, filename, opts)
File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1010, in __init__
self._do_open()
File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1093, in _do_open
fo, hdr = self._make_request(req, opener)
File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1202, in _make_request
fo = opener.open(req)
File "/usr/lib64/python2.4/urllib2.py", line 364, in open
response = meth(req, response)
File "/usr/lib64/python2.4/urllib2.py", line 471, in http_response
response = self.parent.error(
File "/usr/lib64/python2.4/urllib2.py", line 396, in error
result = self._call_chain(*args)
File "/usr/lib64/python2.4/urllib2.py", line 337, in _call_chain
result = func(*args)
File "/usr/lib64/python2.4/urllib2.py", line 565, in http_error_302
return self.parent.open(new)
File "/usr/lib64/python2.4/urllib2.py", line 358, in open
response = self._open(req, data)
File "/usr/lib64/python2.4/urllib2.py", line 376, in _open
'_open', req)
File "/usr/lib64/python2.4/urllib2.py", line 337, in _call_chain
result = func(*args)
File "/usr/lib64/python2.4/site-packages/M2Crypto/m2urllib2.py", line 82, in https_open
h.request(req.get_method(), req.get_selector(), req.data, headers)
File "/usr/lib64/python2.4/httplib.py", line 810, in request
self._send_request(method, url, body, headers)
File "/usr/lib64/python2.4/httplib.py", line 833, in _send_request
self.endheaders()
File "/usr/lib64/python2.4/httplib.py", line 804, in endheaders
self._send_output()
File "/usr/lib64/python2.4/httplib.py", line 685, in _send_output
self.send(msg)
File "/usr/lib64/python2.4/httplib.py", line 652, in send
self.connect()
File "/usr/lib64/python2.4/site-packages/M2Crypto/httpslib.py", line 47, in connect
self.sock.connect((self.host, self.port))
File "/usr/lib64/python2.4/site-packages/M2Crypto/SSL/Connection.py", line 174, in connect
ret = self.connect_ssl()
File "/usr/lib64/python2.4/site-packages/M2Crypto/SSL/Connection.py", line 167, in connect_ssl
return m2.ssl_connect(self.ssl, self._timeout)
M2Crypto.SSL.SSLError: unknown protocol
执行 yum update 会导致与上面相同的错误。
我已于 2015 年 3 月 19 日将 openssl 升级到 OpenSSL 1.0.2a，但错误仍然相同。
如何修复，以便我能够使用 yum 安装软件包？
谢谢你。
旧版操作系统无法使用默认的 /etc/yum.repos.d/CentOS-Base.repo 文件。 一些links建议使用http://vault.centos.org/，但是它在内部重定向到https链接，这使得yum命令失败并出现SSL错误“M2Crypto.SSL.SSLError：未知协议”。
经过一些研究，它对我来说适用于以下基本 URL（这里我尝试使用 5.11 Cent 操作系统版本）。 http://archive.kernel.org/centos-vault/5.11/
也许您可以在这里找到您想要的包裹：
那里有一些 .iso 映像，可能包含您需要的包。我在这里看到 openssl rpm，但它与您发布的版本不同：
它有效。感谢您节省时间和旧服务器（Centos 5.5）的拯救。