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linux kernel

Linux Network IP Accounting

I need to know how much data are transmitted on my ppp0 network or eth0 Internet links? How do I set IP accounting by address such as and How do I set IP accounting per Apache virtual domain? How do I set accounting by service port (http, smtp) and protocol (tcp, udp, icmp)? How do I record how much traffic each of the clients computer is using?
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CentOS / Redhat: Install KVM Virtualization Software

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions Intel VT or AMD-V. How do I install KVM under CentOS or Red Hat Enterprise Linux version 5.5?
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Linux Kernel Recompile: Do I Have To Recompile All Installed Applications

If I recompile just the Linux kernel, do I have to recompile the whole entire applications/other files in my systems?
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Fedora Linux Install Linux Kernel Headers And Developer Files

I'm trying to install vmware-tools but Fedora Linux v12 prompting for kernel headers. How do I install kernel headers under Fedora Linux?
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Linux Iptables: Add / Delete An IP Address Remotely Using A Shell Script

I've root ssh access and need to add / delete a few IP address on fly using the IPtables command via local shell script. How do I add or delete an IP address remotely over the SSH session under CentOS / Redhat / RHEL / Debian / Ubuntu Linux?
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Linux Tuning The VM (memory) Subsystem

I've fast RAID-10 disk subsystem with multiple SCSI disks. Apps running under modern Linux kernel don't write directly to the disk. They write it to the file system cache which is managed by Linux kernel virtual memory manager. Since I've high performance RAID controller I need to decrease the number of flushes. How do I tune virtual memory subsystem under Linux operating systems for better performance?
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BIND: Max open files (1024) is smaller than max sockets (4096) Error and Solution

While going though my logs I found that BIND9 on Debian version 5.x is giving a warning which read as follows:

max open files (1024) is smaller than max sockets (4096)

How do I fix this problem?
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What is Linux?

Can you explain me Linux? What is Linux? Is it a kernel or an operating systems?
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Iptables: Unblock / Delete an IP Address Listed in IPtables Tables

I am a brand new user of a Linux iptables and I can't find how to instruct my iptables to delete or unblock an IP address listed in iptables firewall. I'm using Debian Linux version. Can you help please?
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Linux Load USB Driver

How do I load USB driver under Linux operating system using the command prompt?
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