1.首先需要在终端中运行如下命令:
yum install bash-completion
或者你可以安装一些初始化的包组:
yum -y groupinstall Base Compatibility libraries Debugging Tools Dial-up Networking suppport Hardware monitoring utilities Performance Tools Development tools
2.如果上述命令不行,可以试试下面这个命令
yum upgrade
3.如果上述两个命令还是不行,可以将机器重启,或者重新登录