Add Users2015/11/25

[1]	Add a new user account.

localhost:~ #

useradd -m suse

localhost:~ #

New password:

# set password

Retype new password:

# confirm

passwd: password updated successfully
localhost:~ #

# logout

[2]	Try to switch from a user that was added above to root account.

localhost login:

suse

# input user name

password:

# password

suse@localhost:~>

su -

# switch to root

Password:

# root password

localhost:~ #

# just switched to root

[3]	Limit users who can execute su commmand. Th example below limits only "root" and "suse".

localhost:~ #

usermod -G wheel root

localhost:~ #

usermod -G wheel suse

localhost:~ #

vi /etc/pam.d/su

# line 2: add

auth     required       pam_wheel.so

localhost:~ #

vi /etc/pam.d/su-l

# line 2: add

auth     required       pam_wheel.so

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