bash_completion无法使用

查看是否安装bash_completion

没有安装则安装

[root@localhost ~]# rpm -qa  |grep bash-completion
bash-completion-2.1-8.el7.noarch

查看/etc/bash_completion是否存在

[root@localhost ~]# ls /etc/bash_completion
ls: cannot access /etc/bash_completion: No such file or directory

找到/etc/bash_completion位置

[root@localhost ~]# find / -name bash_completion
/usr/share/bash-completion/bash_completion

将其复制到/etc下

cp /usr/share/bash-completion/bash_completion /etc/

修改/etc/profile文件,使其全局生效

echo "source /etc/bash_completion" >>/etc/profile

rpm -q bash-completion && find / -name bash_completion |xargs -I file mv file /etc && echo "source /etc/bash_completion" >>/etc/profile |source /etc/bash_completion