What if I forget my password in linux? (Grub)

Article Title: What should I do if I forget my password in linux? (Grub ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
About grub
1. When the grub screen appears, use the up and down keys to select the one you usually start linux (do not select dos), and then press the e key
2. Use the up and down keys again to select the one you usually start linux (similar to kernel/boot/vmlinuz-2.4.18-14 ro root = LABEL =/), and then press the e key
3. Modify the command line you see and add single. The result is as follows:
Kernel/boot/vmlinuz-2.4.18-14 single ro root = LABEL =/
4. Press enter to return, and then press the B key to start, you can directly enter the linux Command Line
5. # vi/etc/shadow
Delete the contents of the first line, that is, the content before "root" and "Next", in the line starting with "root,
The first line is similar
Root ::......
Save
6. You can also use the command passwd to change the password.
7. # restart reboot. the root password is blank.