Linux-centos7 How to recover a password

1. What if I forget the root password?

Using single-user mode

First step: Restart the Linux server

Restart command: Reboot,init 6,shutdown-r now

Shutdown command: Poweroff,init 0

OK, restart the server. Then enter the login screen

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Use the upper and lower keys, select the red arrow, press the E key, enter the Grub interface, as follows

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Then find the red Arrow place, as follows

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Modify the contents of the RO for RW init=/sysroot/bin/sh crashkernel=auto, and then ctrl+x, enter the following interface

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Using the command ls/sysroot/root/

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Discovery is the same as the content in the normal system ls/root.

Use the command:

Chroot/sysroot

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This is used, and you find the same as the normal system.

Use the command passwd root to change the password, and don't forget to modify the environment variable: lang=en

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Finally, don't forget a key command:

Touch/.autolabel

Finally restart the server, the password reverts to the password you just modified.

This scenario must be local, if the remote way is implemented not to come

Linux-centos7 How to recover a password