How to set a password for operating system selection in grub2

Hello everyone

As you may know, one of greatest concerns in operating a Linux system is security and this comes in line using security features such as passwords on a system to restrict unauthorized users from accessing some parts of a system.

Therefore how can i set a password for my grub2 entries to limit restrict unauthorized users from accessing grub entries.

Hi

For setting grub password look at the below link

http://www.tecmint.com/password-protect-grub-in-linux/

hmm tried this one works good…
after setting grub password , and entered through the grub password into single user mode and resetted the root password,
from that onwards i am not able to switch to another user from terminal (ie from nomal user ) , it is telling that password incorrect. but all the passwords are correct.
only from root user i m able to switch user to other users in terminal.
from any of the normal user i m not able to switch to another user ??? what may be the problem , can any one resolve this

Hi,

Reg : SU not working in system

go to

  1. vi /etc/pam.d/su

  2. comment the line given below

    #auth required pam_wheel.so use_uid

(in centos6.7 it comes in line no 6)

3 . save (wq!)

now SU is working fine… :blush:

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