让apt-get的自动补全打开

$ vi ~/.bashrc

# 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 [ -f /etc/bash_completion ]; then  
　　. /etc/bash_completion
fi

若发现/etc/bash_completion文件不存在， 则安装bash-completion

$ sudo apt-get install bash-completion

重新导入/etc/bash_completion

$ source /etc/bash_completion

然后，没有然后了，可以自动补全了，安装的软件吧！

^_^