>If the permissions on /bin/ping were incorrect, it may mean that >your system has been cracked. You probably should check by >running ``rpm -V iputils'' which will show changes in any files >in the package. Thanks Bill for your concern and tips, but it is me who accidentally change the file permission when I run chown command with the wrong parameter. Tsk tsk, I guess I am lucky that the machine are just my test machine for evaluating systems. junji aisalen.wordpress.com Linux Registered User #253162 CentOS User New Email names for you! Get the Email name you've always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/aa/