>我正在运行Ubuntu 13.10
>我没有触及我的.bashrc文件

这是.bashrc文件底部的外观,安装和更新了bash-completion部分：

# enable programmable completion features (you don't need to enable
# this,if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
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

有任何想法吗？