新装了CentOS 6.5系统，打算使用yum安装程序是出现了如下错误：

Loading mirror speeds from cached hostfile

Traceback (most recent call last):

File "/usr/bin/yum", line 29, in <module>

yummain.user_main(sys.argv[1:], exit_code=True)

File "/usr/share/yum-cli/yummain.py", line 285, in user_main

errcode = main(args)

File "/usr/share/yum-cli/yummain.py", line 136, in main

result, resultmsgs = base.doCommands()

File "/usr/share/yum-cli/cli.py", line 434, in doCommands

self._getTs(needTsRemove)

File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 99, in _getTs

self._getTsInfo(remove_only)

File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 110, in _getTsInfo

pkgSack = self.pkgSack

File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 887, in <lambda>

pkgSack = property(fget=lambda self: self._getSacks(),

File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 669, in _getSacks

self.repos.populateSack(which=repos)

File "/usr/lib/python2.6/site-packages/yum/repos.py", line 279, in populateSack

self.doSetup()

File "/usr/lib/python2.6/site-packages/yum/repos.py", line 105, in doSetup

self.ayum.plugins.run('postreposetup')

File "/usr/lib/python2.6/site-packages/yum/plugins.py", line 184, in run

func(conduitcls(self, self.base, conf, **kwargs))

File "/usr/lib/yum-plugins/fastestmirror.py", line 197, in postreposetup_hook

if downgrade_ftp and _len_non_ftp(repo.urls) == 1:

File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 699, in <lambda>

urls = property(fget=lambda self: self._geturls(),

File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 696, in _geturls

self._baseurlSetup()

File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 648, in _baseurlSetup

self.mirrorurls = self._replace_and_check_url(mirrorurls)

File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 691, in _replace_and_check_url

print 'YumRepo Error: All mirror URLs are not using ftp, http[s] or file.\n Eg. %s' % misc.to_utf8(skipped)

File "/usr/lib64/python2.6/codecs.py", line 351, in write

data, consumed = self.encode(object, self.errors)

UnicodeDecodeError: 'ascii' codec can't decode byte 0xbc in position 3746: ordinal not in range(128)

解决方案

依次执行以下操作:

cd /var/lib/rpm/

rm -i __db.*

yum clean all

yum history new