问题
新装了CentOS 6.5系统，打算使用yum安装程序是出现了例如以下错误：
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)
解决方式
依次运行下面操作:
cd /var/lib/rpm/ rm -i __db.* yum clean all yum history new