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linux server

The iftop command listens to network traffic on a named network interface, or on the first interface it can find which looks like an external interface if none is specified, and displays a table of current bandwidth usage by pairs of hosts. iftop is a perfect tool for remote Linux server over ssh session.
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Iptables has a special module called owner (ipt_owner), which is attempts to match various characteristics of the packet creator, for locally generated packets. It is valid in the OUTPUT and POSTROUTING chains.
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PHP4 or PHP5 do not have any problem to execute php3 files. The only problem is you need to force PHP4 or PHP5 to understand .php3 file extension as a php script.
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How to: Allow Any User To Shutdown a Linux Server

You need to use the sudo command to grant a permission to other users to shutdown your server. The sudo command allows a permitted user to execute a command as the superuser or another user, as specified in the /etc/sudoers file. Login as a root user and type the visudo command to edit the sudoers file.
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Shutdown Linux Server With Shutdown Account

Have you ever wondered why shutdown account exists on Linux server, especially under Red Hat Enterprise Linux distribution? The answer is quite simple - shutdown account can shutdown server. Here is how you can enable the shutdown account:
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