Add an User

2014/07/08

[1]	Add an User "cent" as an example below.

[root@dlp ~]#  useradd cent  [root@dlp ~]#  passwd cent  Changing password for user cent. New UNIX password: # set password Retype new UNIX password: # confirm passwd: all authentication tokens updated successfully. [root@dlp ~]#  exit  # logout

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

dlp login:  cent # input user name password:  # password [cent@dlp ~]$  su -  # switch to root Password: # root password [root@dlp ~]#  # just switched to root

[3]	Make a user be only a user who can switch to root as an administration user. (it's 'cent' in this example)

[root@dlp ~]#  usermod -G wheel cent  [root@dlp ~]#  vi /etc/pam.d/su #%PAM-1.0 auth sufficient pam_rootok.so # Uncomment the following line to implicitly trust users in the "wheel" group. #auth sufficient pam_wheel.so trust use_uid # Uncomment the following line to require a user to be in the "wheel" group. # uncomment the following line auth required pam_wheel.so use_uid auth substack system-auth auth include postlogin account sufficient pam_succeed_if.so uid = 0 use_uid quiet account include system-auth password include system-auth session include system-auth session include postlogin session optional pam_xauth.so

[4]	To forward to emails for root user to another user, set like follows. (it's 'cent' in this example)

[root@dlp ~]#  vi /etc/aliases # Person who should get root's mail # last line: uncomment and change to a user root:  cent [root@dlp ~]#  newaliases  # reload