Linux notes: Forget the logon password of the root user and normal user

After installing the latest VM8, I felt that the interface was a little dazzling. I decided to install the RedHatLinuxServer version. I had no chance to continue my study. During the winter vacation, I naturally got up when I was at home, but the tragedy is that I forgot my password. After trying for half a day, I forgot the password for both the root user and the common user = .. = I found a simple solution on the Internet, which is effective during the test. So I decided to post the process to the Local Operating System: 64bit Virtual Machine of win7 flagship edition: VMwareWo

After installing the latest VM 8, I felt that the interface was a little dazzling. I decided to install RedHat Linux Server. I had no chance to continue learning. During the winter vacation, I naturally got up when I was at home, but the tragedy is that I forgot my password. After trying for half a day, I forgot the password for both the root user and the common user = .. = I found a simple solution on the Internet, which is effective for the test. So I decided to post the process.

Local Operating System: 64 bit for win7 flagship Edition

Virtual Machine: VMware Workstation 8

Virtual Machine Operating System: Red Hat Linux.5.5.for. x86. server version 2515dd4e215225dd. iso

1. Restart the Linux operating system

2. After Linux is restarted, there will be a series of Environment checks in the terminal state. A color GRUB boot interface will appear in about half a minute, and a 5-second countdown will wait, as shown in figure

3. Enter the e key after the above interface appears, a color guide will appear, and the following three options will appear

Kernel/xen.gz-2.6.28-8. e15

Module/vmlinux-2.6.18.e15xen ro root =/dev/VolGroup00/LogVo100 rhgb quiet

Module/initrd-2.6.18-8.e15xen.img

4. Move to the second option, press e to enter, add single or 1, and press Enter.

5. Press B to enter the restart mode. When the following prompt is displayed, enter boot and press Enter. During this period, the input must be completed quickly.

Starting udev:

6. The following prompt is displayed. Enter passwd and press Enter. The new password of the root user will be prompted. Repeat the new password.

Sh-3.2 #

7. After reboot is completed, restart.

Change the password of a common user

1. log on to the system as the root user. If you forget the user name, perform Step 1 to search for the user name. If you remember the user name, go to step 2.

2. Find the/etc/shadow file.

3. Find the line starting with the user name. For example, if my user name is "PPS" and the colon is used as the delimiter, the red part is the encrypted part of the password.

PPS: $1 $ CivopRgF $ ajWQ54W1XJbifFjm05Jk/1: 15353: 0: 99999: 7 :::

4. The TPNs are my username. Run the passwd TPSs command on the terminal and enter the new user password.