1、第一种错误
之前我的yum一直挺好用，后来突然出错了，装什么都装不上，所有的都报错如下：
Loaded plugins: refresh-packagekit
YumRepo Warning: not using ftp, http[s], or file for repos, skipping - <html><head>
YumRepo Warning: not using ftp, http[s], or file for repos, skipping - <meta http-equiv="Content-Type" c>
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 241, in user_main
errcode = main(args)
File "/usr/share/yum-cli/yummain.py", line 116, in main
result, resultmsgs = base.doCommands()
File "/usr/share/yum-cli/cli.py", line 307, in doCommands
self._getTs()
File "/usr/lib/python2.5/site-packages/yum/depsolve.py", line 98, in _getTs
self._getTsInfo()
File "/usr/lib/python2.5/site-packages/yum/depsolve.py", line 104, in _getTsInfo
self._tsInfo.setDatabases(self.rpmdb, self.pkgSack)
File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 576, in <lambda>
pkgSack = property(fget=lambda self: self._getSacks(),
File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 419, in _getSacks
self.repos.populateSack(which=repos)
File "/usr/lib/python2.5/site-packages/yum/repos.py", line 245, in populateSack
sack.populate(repo, mdtype, callback, cacheonly)
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 149, in populate
if self._check_db_version(repo, mydbtype):
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 203, in _check_db_version
return repo._check_db_version(mdtype)
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 928, in _check_db_version
repoXML = self.repoXML
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 1086, in <lambda>
repoXML = property(fget=lambda self: self._getRepoXML(),
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 1078, in _getRepoXML
self._loadRepoXML(text=self)
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 1068, in _loadRepoXML
return self._groupLoadRepoXML(text, ["primary"])
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 1052, in _groupLoadRepoXML
if self._commonLoadRepoXML(text):
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 904, in _commonLoadRepoXML
result = self._getFileRepoXML(local, text)
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 772, in _getFileRepoXML
cache=self.http_caching == 'all')
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 643, in _getFile
result = self.grab.urlgrab(relative, local,
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 463, in <lambda>
grab = property(lambda self: self._getgrab())
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 458, in _getgrab
self._setupGrab()
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 447, in _setupGrab
self._grab = mgclass(self._grabfunc, self.urls,
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 548, in <lambda>
urls = property(fget=lambda self: self._geturls(),
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 545, in _geturls
self._baseurlSetup()
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 514, in _baseurlSetup
self.mirrorurls = self._replace_and_check_url(mirrorurls)
File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 536, in _replace_and_check_url
print 'YumRepo Warning: not using ftp, http[s], or file for repos, skipping - %s' % (url)
File "/usr/lib/python2.5/codecs.py", line 303, in write
data, consumed = self.encode(object, self.errors)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xbb in position 78: ordinal not in range(128)
于是上网查了一下，有人说是fastmirror的问题，于是使用
yum remove yum-fastmirror
发现这个命令也是报以上错误^_^，于是继续google，终于找到解决的方法;
yum clean all
之后yum东西就不再报这个错了，同时fastmirror还能继续使用
知其然，还要知其所以然，于是man yum，可以看到,clean选项的作用是：
Is used to clean up various things which accumulate in the yum
cache directory over time. More complete details can be found
in the Clean Options section below.
这个命令是用来清除缓存目录(/var/cache/yum)下的软件包及旧的headers的
命令：yum clean, yum clean all (= yum clean packages; yum clean oldheaders)
2、第二种错误：
[root@macross linux下上网相关]# yum install unrar
载入插件: refresh-packagekit
锁已被用 /var/run/yum.pid: 另外的一个复制正在运行在 PID为 3230.
另外一个应用程序正在适用yum锁；等待其退出 ... ...
另外一个应用程序正在适用yum锁；等待其退出 ... ...
另外一个应用程序正在适用yum锁；等待其退出 ... ...
另外一个应用程序正在适用yum锁；等待其退出 ... ...
那是因为有其他的进程在使用yum
使用kill －9 3230就可以了，如果还有其他的在占用就继续更改数字