树莓派修改root密码并修改更新源

一，修改root密码

[email protected]:~ $ sudo passwd root
New password:                                    #在这输入你要设置的密码
Retype new password:                             #在输一遍你要设置的密码
passwd: password updated successfully            #设置成功

二，修改更新源

[email protected]:~ $ su root                       #切换到root用户 
Password:                                        #输入root的密码
[email protected]:/home/pi# echo "deb http://mirrors.aliyun.com/raspbian/raspbian/ jessie main non-free contrib rpi" >/etc/apt/sources.list
[email protected]:/home/pi# echo "deb-src http://mirrors.aliyun.com/raspbian/raspbian/ jessie main non-free contrib rpi" >>/etc/apt/sources.list
[email protected]:/home/pi# apt-get update         #获取更新
[email protected]:/home/pi# apt-get upgrade        #更新系统