Linux System Administration

Linux Command Line, Generating a Random File

It is very easy to create a random file using the linux command…

Tweaking TCP for Fast (100mbps+) Connections and Transfers on Linux

We recently did some speed testing on a few of the servers on our network, and we were not receiving the speeds expected considering they were sitting on a physical 100mbps ethernet port. The servers were indeed on physical 100mbps connection, however wget (TCP/IP, HTTP Port 80) download tests showed only a max of about 1.5MB/sec (note the 8bit/byte conversion, so this translates to about 12mbits).

A Poor Man's VPN: Proxy Web Connection to Remote Server (via SSH and Tunnel)

Did you ever have a situation where you needed to access a website…

How to Install SNMP on Tomato Router Firmware and Graph Traffic with Cacti

You've flashed your old WRT54G or other vanilla router with the…

Command Line Packet Sniff Existing Running Process in Linux

Have you ever come across a server that is doing a lot of traffic?…

Ubuntu Server in Place Network Upgrade From 8.10 to 9.04

It is easy to do an in-place upgrade of Ubuntu Server from…

Installing And Compiling Zabbix Client / Agent

Zabbix is an excellent system monitoring package. It does…