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Initial Settings : Add Common Users2019/01/14

[1] If you'd like to add common user accounts on Fedora Server, Configure like follows.
localhost:~ #
useradd -m suse

localhost:~ #
passwd suse

New password:                   # set password
Retype new password:            # confirm
passwd: password updated successfully
[2] If you'd like to switch to root account from a user added above, use [su] command to do so.
localhost login: suse           # input user name
password:                       # input password
suse@localhost:~>
su -
        
# switch to root

Password:                       # root password
localhost:~ #                   # just switched to root account
[3] Make a user (it's [suse] in this example) be only a user who can switch to root as an administration user.
localhost:~ #
usermod -G wheel root

localhost:~ #
usermod -G wheel suse

localhost:~ #
vi /etc/pam.d/su
# line 2 : add

auth     required       pam_wheel.so use_uid

localhost:~ #
vi /etc/pam.d/su-l
# line 2 : add

auth     required       pam_wheel.so use_uid
[4] If you'd like to remove a user accounts, Configure like follows.
# remove a user [suse] (only removed user account)

localhost:~ #
userdel suse
# remove a user [suse] (removed user account and his home directory)

localhost:~ #
userdel -r suse
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