Hi, Mine is a SUSE Linux machine. I have installed sudo-1.6.7p5-117.1 rpm. The problem is, when I do "sudo su - <userID>", it never accepts the password and keeps on asking for it. I hav seen the FAQs, which says to look for config.h file, but I am not able to fix it. Will anybody help. Thanks in Advance. Regards, Asif