[root@ok ~]# vim /etc/pam.d/su
下面是/etc/pam.d/su文件的内容
1 #%PAM-1.0 2 auth sufficient pam_rootok.so 3 # Uncomment the following line to implicitly trust users in the "wheel" group. 4 #auth sufficient pam_wheel.so trust use_uid 5 # Uncomment the following line to require a user to be in the "wheel" group. 6 #auth required pam_wheel.so use_uid 7 auth include system-auth 8 account sufficient pam_succeed_if.so uid = 0 use_uid quiet 9 account include system-auth 10 password include system-auth 11 session include system-auth 12 session optional pam_xauth.so 将第４行的#号去掉，然后将登陆用户加入 wheel组 [root@ok ok]# usermod -G wheel ok [ok@ok ~]$ su [root@ok ok]# su直接切换成root