The method to retrieve the password after linux changes the root password and linux forgets the root password
- 2020-05-07 20:48:42
- OfStack
Log in as root and execute:
# passwd The user name ( Change the password )
# useradd The user name ( Add user )
Specific examples are as follows:
[root@bogon ~]# passwd root
Changing password for user root.
New UNIX password:
BAD PASSWORD: it is based on a dictionary word
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
linux, root password recovery method
linux's root enjoys supreme power, and it is a great headache to forget or steal root's password once it has been stolen. So how can I retrieve root's password? I summarize it as follows:
(1) password cracking of Linux system
1. From the grub menu, press e to enter edit mode
2. Edit the kernel line /init 1 (or /single)
3. Press B to restart
4. Enter and execute the following commands
root@#passwd root ( configuration root The password )
Enter new unix password: Enter a new password
root@#init 6
(2) password cracking of debian linux system
1. In the grub options menu 'Debian GNU/Linux... (recovery mode)', press e to enter edit mode
2. Edit ro single of kernel to rw single init=/bin/bash, press b to restart
3. Enter and execute the following commands
root@(none)#mount -a
root@(none)#passwd root
root@(none)#reboot
(3) password cracking of Freebsd system
1. Boot into the boot menu
2. Select each item (press 4) to enter single-user mode
Enter a list of commands
root@#mount -a
root@#fsck -y
root@#passwd( Password change command )