This method only applies if the root password cannot be changed through the ECS console
Check the/etc/default/grub
cat /etc/default/grub
Modify /etc/default/grub
sed -i 's/GRUB_HIDDEN_TIMEOUT=0/#GRUB_HIDDEN_TIMEOUT=0/g' /etc/default/grub
sed -i 's/GRUB_TIMEOUT=30/GRUB_TIMEOUT=50/g' /etc/default/grub
sed -i 's/GRUB_HIDDEN_TIMEOUT_QUIET=true/GRUB_HIDDEN_TIMEOUT_QUIET=false/g' /etc/default/grub
Check to see if the modification was successful
update /etc/default/grub
sudo update-grub
Force a restart at the ECS console to open a VNC window using the remote connection to the ECS console, VNC
To move to advanced mode press e
Follow the screenshot below
Modify RO Recovery Nomodese into Quiet Splash RW init=/bin/bash
Press F10
To select the recovery mode, press E
Modify RO Recovery Nomodese into Quiet Splash RW init=/bin/bash
Press F10
Change the password
Enter a new password
Restart the system at the ECS console