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...
1 [root@localhost ~]# yum
2 -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
1 rpm -ivh --nodeps http://mirrors.163.com/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-14.el5.centos.1.noarch.rpm
2 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
3 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
1 --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
1 [root@localhost ~]# yum
2 There was a problem importing one of the Python modules
3 required to run yum. The error leading to this problem was:
4
5 libxml2.so.2: cannot open shared object file: No such file or directory
6
7 Please install a package which provides this module, or
8 verify that the module is installed correctly.
9
10 It's possible that the above module doesn't match the
11 current version of Python, which is:
12 2.4.3 (#1, Nov 11 2010, 13:30:19)
13 [GCC 4.1.2 20080704 (Red Hat 4.1.2-48)]
14
15 If you cannot solve this problem yourself, please go to
16 the yum faq at:
17 http://wiki.linux.duke.edu/YumFaq
因为yum调用的是python,运行 Python，试下是否可行
1 [root@localhost~]# python
2 Python 2.4.3 (#1, Nov 11 2010, 13:30:19)
3 [GCC 4.1.2 20080704 (Red Hat 4.1.2-48)] on linux2
4 Type "help", "copyright", "credits" or "license" for more information.
5 >>> import yum
6 Traceback (most recent call last):
7 File "<stdin>", line 1, in ?
8 File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 54, in ?
9 import transactioninfo
10 File "/usr/lib/python2.4/site-packages/yum/transactioninfo.py", line 31, in ?
11 from sqlitesack import YumAvailablePackageSqlite
12 File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 26, in ?
13 import yumRepo
14 File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 32, in ?
15 import sqlitecachec
16 File "/usr/lib64/python2.4/site-packages/sqlitecachec.py", line 19, in ?
17 import _sqlitecache
18 ImportError: libxml2.so.2: cannot open shared object file: No such file or directory
19 >>>
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
1 [root@localhost ~]# yum
2 Loaded plugins: fastestmirror
3 You need to give some command
4 usage: yum [options] COMMAND
5
6 List of Commands:
7
8 check-update Check for available package updates
9 clean Remove cached data
10 deplist List a package's dependencies
11 downgrade downgrade a package
12 erase Remove a package or packages from your system
13 groupinfo Display details about a package group
14 groupinstall Install the packages in a group on your system
15 grouplist List available package groups
16 groupremove Remove the packages in a group from your system
17 help Display a helpful usage message
18 info Display details about a package or group of packages
19 install Install a package or packages on your system
20 list List a package or groups of packages
21 localinstall Install a local RPM
22 makecache Generate the metadata cache
23 provides Find what package provides the given value
24 reinstall reinstall a package
25 repolist Display the configured software repositories
26 resolvedep Determine which package provides the given dependency
27 search Search package details for the given string
28 shell Run an interactive yum shell
29 update Update a package or packages on your system
30 upgrade Update packages taking obsoletes into account
31
32
33 options:
34 -h, --help show this help message and exit
35 -t, --tolerant be tolerant of errors
36 -C run entirely from cache, don't update cache
37 -c [config file] config file location
38 -R [minutes] maximum command wait time
39 -d [debug level] debugging output level
40 --showduplicates show duplicates, in repos, in list/search commands
41 -e [error level] error output level
42 -q, --quiet quiet operation
43 -v, --verbose verbose operation
44 -y answer yes for all questions
45 --version show Yum version and exit
46 --installroot=[path] set install root
47 --enablerepo=[repo] enable one or more repositories (wildcards allowed)
48 --disablerepo=[repo] disable one or more repositories (wildcards allowed)
49 -x [package], --exclude=[package]
50 exclude package(s) by name or glob
51 --disableexcludes=[repo]
52 disable exclude from main, for a repo or for
53 everything
54 --obsoletes enable obsoletes processing during updates
55 --noplugins disable Yum plugins
56 --nogpgcheck disable gpg signature checking
57 --disableplugin=[plugin]
58 disable plugins by name
59 --enableplugin=[plugin]
60 enable plugins by name
61 --skip-broken skip packages with depsolving problems
62 --color=COLOR control whether color is used
63
64 Plugin Options:
最后，赶紧更新一下系统吧
1 yum update
好了 这样yum问题就完全解决了！