What is required:
- vCenter Appliance
- Redhat Enterprise Linux 7.2 or CENT OS 7.2 ISO
Step 01:
Mount bootable ISO to the VCSA
Select connect at power on
Change the boot loader priority to ISO
Step 02:
Boot the VM and select “Troubleshooting”
Step 03:
Select the rescue mode and press enter to continue.
Step 04:
Select “Continue” to mount the VCSA’s root file-system in Read/write mode under /mnt/sysimage. RHEL or CENT is capable to detecting the VCSA’s root volume and mounting it.
Step 05:
VCSA’s root file-system is mounted under /mnt/sysimage and you got the shell to play with this.
Step 06:
Navigate to /mnt/sysimage/boot directory and list the contents (cd /mnt/sysimage/boot/ and then ls -lrt).
Step 07:
Navigate to grub directory and list the contents. “menu.lst” is the file which holds the GRUB boot loader password.
Step 08:
Use “vi” editor to edit the menu.lst file. ( vi menu.lst).
Step 09:
Remove Password line from menu.lst (After that just save the file by pressing key sequence :wq).
Step 10:
Exit the shell by typing exit (YOU ARE DONE).