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原文连接:http://www.raspberrypi-spy.co.uk/2014/08/how-to-reset-a-forgotten-raspberry-pi-password/
大致过程是这样的:
1、首先将sd卡从树莓派取出,
2、在另一台电脑上,修改初始化进程为bin目录下的sh;
3、然后插入树莓派启动起来,启动后会停留在命令行,在此通过passwd加你的用户名来设置密码(即使root也可以在此修改,这里之前是否初始化过root密码不太确定)
4、树莓派关机,取出sd卡,插入另一台电脑,恢复启动文件,修改密码过程完成
详细步骤看翻译吧
翻译如下:
步骤1-取出sd卡
Power down the Pi and remove the SD card. Insert it into your PC.
将树莓派关机,移除sd卡,插入到你的电脑
步骤2-编辑cmdline.txt
The boot partition should be visible and contain a file named “cmdline.txt”. Edit this file in a text editor and add the following to the end of the existing text :
启动部分是可见的,并包含一个名为“cmdline.txt”的文件。在编辑器中编辑这个文本,并将下文插入到已有文本的最后
init=/bin/sh
If the original content was :
如果原文是这样的:
dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait
it should now look like :
那么编辑后应该是这样的:
dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait init=/bin/sh
Make sure it is all one line! Save the text file and eject the SD card from the PC.
确保所有内容在同一行。保存文本内容,从pi出取出sd卡
步骤3-重设密码
Insert the card into a Pi that is connected to a monitor and keyboard. Power up the Pi. There may be a delay but you should be presented with a flashing cursor.
将sd卡插入树莓派(我们在这里需要连上显示器和键盘)。将树莓派开机,估计在显示闪动的光标前需要等一会。
At the prompt type the following command :
在标识符后,输入以下命令:
passwd pi
You will then be prompted for a new password. Enter it carefully and press the [Return] key. It will now ask you to retype the password.
你会被提示输入一个新的密码,请仔细输入后并敲下回车键。系统会提示你再次确认输入密码
The password has been changed.
这样密码就修改完成了
Now type the following commands :
现在输入以下命令去同步并执行初始化程序
sync exec /sbin/init
The Pi will continue to boot and return you to the normal command line prompt.
树莓派会继续启动
Shutdown the Pi and power it off.
关掉树莓派并且断电
sudo halt
第四步-编辑cmdline.txt文本
Using the PC edit the “cmdline.txt” file again and remove the “init=/bin/sh” text you added in Step 2.
用电脑再次编辑这个文本:把我们在第二步加入的最后数据删除
You can now return the SD card to your Pi, reboot and use the new password.
现在你可以插入sd卡到你的树莓派啦,再次启动就可以使用新的密码啦。
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原文地址:http://www.cnblogs.com/kunyashaw/p/4243813.html