ubuntu 14.04 tab失效问题

一、利用vi编辑器打开 /etc/bash.bashrc文件（须要root权限）

sudo vi /etc/bash.bashrc

接下来会提示输入密码

二、找到文件中的下列代码

#enable bash completion in interactive shells
#if ! shopt -oq posix; then # if [-f /usr/share/bash-completion/bash_completion ]; then # . /usr/share/bash-completion/bash_completion # elif [ -f /etc/bash_completion]; then # . /etc/bash_completion # fi #fi

将注释符号#去掉，即改为

#enable bash completion in interactive shells
if ! shopt -oq posix; then if [-f /usr/share/bash-completion/bash_completion ]; then . /usr/share/bash-completion/bash_completion elif [ -f /etc/bash_completion]; then . /etc/bash_completion fi fi

三、最后 source一下 /etc/bash.bashrc便可， 即

sudo source /etc/bash.bashrc