今天在安装程序时，发现有一个插件未安装，我就随手敲了一个命令,看都没看
复制代码代码如下:
yum remove yum
然后就杯具了...
复制代码代码如下:
[root@localhost ~]# yum
-bash: /usr/bin/yum: No such file or directory
这个粗心的手误倒不至于让整个系统瘫痪，yum 却无法使用了。于是，我试着折腾了一番
复制代码代码如下:
rpm -ivh --nodeps http://mirrors.163.com/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-14.el5.centos.1.noarch.rpm
rpm -ivh --nodeps http://mirrors.163.com/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-3.el5.centos.x86_64.rpm
rpm -ivh --nodeps http://mirrors.163.com/centos/5/os/x86_64/CentOS/yum-3.2.22-26.el5.centos.noarch.rpm[/code]
关于rpm --nodeps的解释
[code]
--nodeps don't verify package dependencies
接下来，再次尝试输入yum,结果再次出现莫名错误
复制代码代码如下:
[root@localhost ~]# yum
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
libxml2.so.2: cannot open shared object file: No such file or directory
Please install a package which provides this module, or
verify that the module is installed correctly.
It's possible that the above module doesn't match the
current version of Python, which is:
2.4.3 (#1, Nov 11 2010, 13:30:19)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-48)]
If you cannot solve this problem yourself, please go to
the yum faq at:
http://wiki.linux.duke.edu/YumFaq
因为yum调用的是python,运行 Python，试下是否可行
复制代码代码如下:
[root@localhost~]# python
Python 2.4.3 (#1, Nov 11 2010, 13:30:19)
[GCC 4.1.2 20080704 Red Hat 4.1.2-48)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import yum
Traceback (most recent call last):
File "
File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 54, in ?
import transactioninfo
File "/usr/lib/python2.4/site-packages/yum/transactioninfo.py", line 31, in ?
from sqlitesack import YumAvailablePackageSqlite
File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 26, in ?
import yumRepo
File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 32, in ?
import sqlitecachec
File "/usr/lib64/python2.4/site-packages/sqlitecachec.py", line 19, in ?
import _sqlitecache
importError: libxml2.so.2: cannot open shared object file: No such file or directory
>>>
提示缺少libxml2.so.2，安装一下试试
复制代码代码如下:
rpm -ivh http://mirrors.163.com/centos/5/os/x86_64/CentOS/libxml2-2.6.26-2.1.2.8.x86_64.rpm[/code]
再次测试运行下yum命令，结果正常了，大喜
[code]
[root@localhost ~]# yum
Loaded plugins: fastestmirror
You need to give some command
usage: yum [options] COMMAND
List of Commands:
check-update Check for available package updates
clean Remove cached data
deplist List a package's dependencies
downgrade downgrade a package
erase Remove a package or packages from your system
groupinfo Display details about a package group
groupinstall Install the packages in a group on your system
grouplist List available package groups
groupremove Remove the packages in a group from your system
help Display a helpful usage message
info Display details about a package or group of packages
install Install a package or packages on your system
list List a package or groups of packages
localinstall Install a local RPM
makecache Generate the metadata cache
providesFind what package provides the given value
reinstall reinstall a package
repolistDisplay the configured software repositories
resolvedep Determine which package provides the given dependency
search Search package details for the given string
shell Run an interactive yum shell
update Update a package or packages on your system
upgrade Update packages taking obsoletes into account
options:
-h, --help show this help message and exit
-t, --tolerant be tolerant of errors
-C run entirely from cache, don't update cache
-c [config file] config file location
-R [minutes] maximum command wait time
-d [debug level] debugging output level
--showduplicates show duplicates, in repos, in list/search commands
-e [error level] error output level
-q, --quiet quiet operation
-v, --verbose verbose operation
-y answer yes for all questions
--version show Yum version and exit
--installroot=[path] set install root
--enablerepo=[repo] enable one or more repositories (wildcards allowed)
--disablerepo=[repo] disable one or more repositories (wildcards allowed)
-x [package], --exclude=[package]
exclude package(s) by name or glob
--disableexcludes=[repo]
disable exclude from main, for a repo or for
everything
--obsoletes enable obsoletes processing during updates
--noplugins disable Yum plugins
--nogpgcheck disable gpg signature checking
--disableplugin=[plugin]
disable plugins by name
--enableplugin=[plugin]
enable plugins by name
--skip-broken skip packages with depsolving problems
--color=COLOR control whether color is used
Plugin Options:
最后，赶紧更新一下系统吧
复制代码代码如下:
yum update
好了 这样yum问题就完全解决了！
