How to uninstall yum and install yum again?

[sandwich]

"rpm -e yum" to uninstall yum?
Or another command to uninstall yum?
And how to install yum again?

thx~

[HaydnH]

Why do you want to uninstall/reinstall yum? If you really want to you'll need the --nodeps flag after rpm -e to ignore it's dependencies.

Haydn.

[sideways]

The problem with rpm -e --nodeps is that yum will then no longer be available! The trick is to fool the rpm database into thinking you have actually removed yum. So, as root do

rpm -e --nodeps --justdb yum
yum install yum

I'm not sure if this will fix any problems you are having though, so if you still are stuck post specific details of the issue.

[HaydnH]

Hey sideways, that's a nice trick for reinstalling stuff. Cheers.

[sandwich]

Originally Posted by HaydnH

Why do you want to uninstall/reinstall yum? If you really want to you'll need the --nodeps flag after rpm -e to ignore it's dependencies.

Haydn.

Because my yum doesn't work~!

[root@localhost Music]# yum update
Loading "fedorakmod" plugin
Loading "presto" plugin
Loading "changelog" plugin
Loading "refresh-updatesd" plugin
Loading "protectbase" plugin
Loading "tsflags" plugin
Loading "security" plugin
Loading "downloadonly" plugin
Loading "basearchonly" plugin
Loading "kernel-module" plugin
Loading "allowdowngrade" plugin
Loading "priorities" plugin
Loading "fastestmirror" plugin
Loading "merge-conf" plugin
Loading "skip-broken" plugin
Loading "protect-packages" plugin
Traceback (most recent call last):
File "/usr/bin/yum", line 29, in <module>
yummain.main(sys.argv[1:])
File "/usr/share/yum-cli/yummain.py", line 85, in main
base.getOptionsConfig(args)
File "/usr/share/yum-cli/cli.py", line 154, in getOptionsConfig
disabled_plugins=opts.disableplugins)
File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 164, in _getConfig
self.getReposFromConfig()
File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 229, in getReposFromConfig
parser.readfp(confpp_obj)
File "/usr/lib/python2.5/site-packages/iniparse/compat.py", line 106, in readfp
self.data.readfp(fp)
File "/usr/lib/python2.5/site-packages/iniparse/ini.py", line 563, in readfp
if line and line[-1]=='\n':

and yun clean all doesn't work either~

[HaydnH]

If reinstalling yum doesn't work, it could be a python problem.

[sideways]

Having all those plugins is probably not a good idea.

Try disabling plugins

yum --noplugins update

If that seems to work then try removing the plugin-packages and maybe install only the ones you really need.

[sandwich]

I will try it later and thank you all ~

[sandwich]

rpm -e --nodeps --justdb yum
rpm -ivh xxxxx.rpm

It can works now~

thx all~