The root password is cleared and reset

The Linux root password is cleared and reset

 

Clear admin password

🐹 First make a usbCD
🐹 Then mount the hard disk.
🐹 Find the “/etc/shadow” file
🐹 Clear the second field of the “root” row

# for example
root:$6$LMKEYXaW$ukCK.aJw6cJF9DZOoCjxD/oVDhtd24W6LSdoHinpPg4LvmXuLfOiqBGFx2YvqrUk2So65NNOZnHndSToClJSA1:18708:0:99999:7:::
==>root::18708:0:99999:7:::

🐹 Reboot, no password required

 

Reset admin password

CentOS7

👼 Press the E key while reboot
👼 Find “linux16 /vmlinuz…” and add rd.break at the very end,then press “ctrl+x”

👼 Finally, enter four important operating commands

 

Ubuntu 18.04

😄 To start the machine, press the ECS key first, then the E key
😄 Input “systemd.unit=rescue.target”, then press “ctrl+x”

😄Reset root password

passwd root