Root user, normal user password reset and retrieve (CENTOS/REDHAT/DEBIAN/FREEBSD)

Log in as root user

Resetting the root user password

passwd

Reset Tran User Password

PASSWD Tran

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Redhat/centos system root Password back:

Grub Options Menu Press E to enter edit mode

Edit kernel that line,/init 1 or/single

Press B to restart (enter rescue mode)

Execute passwd root (reset new password)

Init 6 reboot to enter new password

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(ii) Debian Linux system password cracking

1. In the Grub Options menu ' Debian gnu/linux,... (recovery mode) ', press E to enter edit mode

2. Edit the kernel on the side of the RO single to RW single init=/bin/bash, press B to perform the restart

3. After entering, execute the following command

[Email protected] (none) #mount-A

[Email protected] (none) #passwd root

[Email protected] (none) #reboot

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Three FREEBSD System Password hack

1. Booting into the boot menu

2. Select each item (press 4) to enter single user mode

3. Enter a list of commands after entering

[Email protected] #mount-A

[Email protected] #fsck-y

[Email protected] #passwd (change password command)

Root user, normal user password reset and retrieve (CENTOS/REDHAT/DEBIAN/FREEBSD)