linux输入yum后提示： -bash: /usr/bin/yum: No such file or directory的解决方法

linux输入yum后提示： -bash: /usr/bin/yum: No such file or directory的解决方案

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

yum remove yum

然后就杯具了...

[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

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

关于rpm --nodeps的解释

--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

[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

[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 "<stdin>", line 1, in ?
  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

rpm -ivh http://mirrors.163.com/centos/5/os/x86_64/CentOS/libxml2-2.6.26-2.1.2.8.x86_64.rpm

再次测试运行下yum命令，结果正常了，大喜

[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
 provides    Find what package provides the given value
 reinstall   reinstall a package
 repolist    Display 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

yum update

好了 这样yum问题就完全解决了！大家可以尝试下，感谢你对我们的支持。