Thank you very much for your concern. I 'll try raising numbers. But, Why i used *? because the server is web hosting server and each user has his own group name. Now, do you have any idea about restricting such situation? Does * mean restrict root also or just all users except root? Do you know any -simple- guide for limits.conf? Thank you very much hameed Jim Perrin wrote: > On 11/21/06, Abd El-Hameed Ayad <hamid at use-trade.com> wrote: >> Hi, >> Can modifications to /etc/security/limits.conf cause top process to >> be automatically killed. >> >> First, Here is the contents of the /etc/security/limits.conf >> >> * hard cpu 2 >> * soft nproc 5 >> * hard nproc 10 >> mailnull hard nproc 100 > > Your numbers seem VERY low except for mailnull. > I would really recommend restricting user groups instead of > EVERYTHING. I believe top may be using more resources than you've > allowed, and is being killed because of it. > >