Hi I am confused regarding PAM, I read the manual for PAM but could not get the proper explaination and not a single complete example. Will anyone explain me using the following example... I have the following config file for login... auth required /lib/security/pam_securetty.so auth required /lib/security/pam_stack.so service=system-auth auth required /lib/security/pam_nologin.so account required /lib/security/pam_stack.so service=system-auth password required /lib/security/pam_stack.so service=system-auth session required /lib/security/pam_stack.so service=system-auth session optional /lib/security/pam_console.so Now explain me what each line one by one means in the file. with regards....