yum提示字符编码错误

1、问题描述：

[root@localhost data]# yum
Loaded plugins: product-id, refresh-packagekit, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
You need to give some command
Traceback (most recent call last):
  File "/usr/bin/yum", line , in <module>
    yummain.user_main(sys.argv[:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line , in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line , in main
    base.getOptionsConfig(args)
  File "/usr/share/yum-cli/cli.py", line , in getOptionsConfig
    self.parseCommands() # before we return check over the base command + args
  File "/usr/share/yum-cli/cli.py", line , in parseCommands
    self.usage()
  File "/usr/share/yum-cli/cli.py", line , in usage
    sys.stdout.write(self.optparser.format_help())
  File "/usr/lib64/python2.6/optparse.py", line , in format_help
    result.append(self.get_usage() + "\n")
  File "/usr/lib64/python2.6/optparse.py", line , in get_usage
    self.expand_prog_name(self.usage))
  File "/usr/lib64/python2.6/optparse.py", line , in format_usage
    return _("Usage: %s\n") % usage
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe4 in position 0: ordinal not in range(128)

2、解决方法：

一、
#yum clean all
#rm -f /var/lib/rpm/__db*
#rpm --rebuilddb
#yum update 

二、
# vim /etc/yum.conf
找到下面一行：
plugins=             #替换为plugins=0

三、

# vim fastestmirror.conf

enabled=1 #替换为enabled=0             这步貌似可以忽略

3、参考网址：

http://www.cnblogs.com/sunss/archive/2010/07/27/1786235.html