-bash: /usr/bin/yum: No such file or directory

问题：

[root@localhost ~]# yum 
-bash: /usr/bin/yum: No such file or directory 

解决办法：

rpm -ivh --nodeps http://vault.centos.org/centos/7.4.1708/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
rpm -ivh --nodeps http://vault.centos.org/centos/7.4.1708/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-42.el7.noarch.rpm
rpm -ivh --nodeps http://vault.centos.org/centos/7.4.1708/os/x86_64/Packages/yum-3.4.3-154.el7.centos.noarch.rpm

其中：7.4.1708是我的系统的版本，可以通过cat /etc/redhat-release查看系统的版本，通过file /bin/ls查看内核版本。

 

 http://vault.centos.org/centos/7.4.1708/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm url失效可以通过http://vault.centos.org网站查找centos/7.4.1708/os/x86_64/Packages/目录下的包