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.
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
Reg : SU not working in system
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…