Featured »

July 14, 2015 – 10:46 pm |

There is no official definition of a “runaway process”. Generally, it is a process that ignores its scheduled priority. It can also be a process that enters an infinite loop. Or it can be a process …

Read the full story »

Unix and Linux network configuration. Multiple network interfaces. Bridged NICs. High-availability network configurations.


Reviews of latest Unix and Linux software. Helpful tips for application support admins. Automating application support.


Disk partitioning, filesystems, directories, and files. Volume management, logical volumes, HA filesystems. Backups and disaster recovery.


Distributed server monitoring. Server performance and capacity planning. Monitoring applications, network status and user activity.

Commands & Shells

Cool Unix shell commands and options. Command-line tools and application. Things every Unix sysadmin needs to know.

Home » Archive by Category

Articles in Networking

Reboot Remote Windows Workstation

December 10, 2009 – 9:53 am | 3 Comments

When using RDP, sometimes the session may lock up and you may need to reboot your workstation remotely. This can be done using the “shutdown.exe” command from your local PC. First, make sure you can …

Slow SSH login in SuSE Linux

November 3, 2009 – 6:17 pm | 16 Comments

Starting with SuSE 10 and including both openSuSE and SLES an annoying SSH problem appeared. When you SSH to the server (via PuTTY and such) you get the “login” prompts right away, but the “password” …

Automatically Validate HTTP Proxies

August 5, 2009 – 4:14 pm | 6 Comments

Let’s say you downloaded a long list of Web proxy servers. Now you are stuck with the task of weeding out the proxies that are dead, slow, fake, or otherwise unusable. There are some applications …

Sharing Videos from Linux to Xbox 360

December 19, 2008 – 8:49 pm | 3 Comments

Xbox 360 uses UPnP protocol to stream multimedia files from computers on your home network. Normally, you would have a Windows PC running WMP and sharing files. But what if you have a Linux box …

Linksys WAP54G Secure Configuration

June 11, 2008 – 1:09 pm | 5 Comments

Below are some basic steps to secure a wireless access point (WAP). The screenshots are for Linksys WAP54G v. 3.04, however, the same steps will apply to wireless access points from other manufacturers. Understand this: …

Migrating email between hosted providers

May 23, 2008 – 9:38 pm | 2 Comments

Recently I ran into a small problem. A customer of mine was moving her site to a new hosting provider. Her old provider was Windows-based and her new provider was Linux-based. The old provider did …

Protected: SuSE Mail Transfer Agent Configuration

February 7, 2008 – 3:48 am | Enter your password to view comments.
Protected: SuSE Mail Transfer Agent Configuration

There is no excerpt because this is a protected post.

Configuring eMule for Best Performance

December 27, 2006 – 12:22 am | 2 Comments

“eMule is a peer-to-peer file sharing application that works with both the eDonkey network and the Kad network. The distinguishing features of eMule are the direct exchange of
sources between client nodes, fast recovery of corrupted …

Simple network monitoring with ping

April 11, 2006 – 10:12 am | 3 Comments

In the Spring of 2005 Comcast experienced a major DNS outage. Since then many Comcast users have switched to DNS servers that belong to Verizon and other ISPs. Comcast started taking a lot of flak …

CUPS printing on Solaris 10

February 28, 2006 – 12:08 pm | 8 Comments

Download the Companion CD for Solaris 10 GA on: Solaris 10 Companion cd download

Accessing Samba server in DMZ

January 22, 2006 – 2:04 pm | 4 Comments

This note explains how to access a Samba server located on the “orange” DMZ subnet from a Windows PC on the “green” LAN. The problem for Samba is caused by the firewall blocking NETBIOS responses. …

Installing SuSE Linux 10 on a laptop

December 10, 2005 – 7:53 pm | 2 Comments

What’s the best Linux distro for desktop applications? My subjective opinion based on years of Linux experience is that SuSE 10 at the moment offers the best combination of features and user friendliness. The latter, …

Configuring multi-IP network interfaces

December 2, 2005 – 12:18 pm | One Comment

This article explains how to configure a network interface to support virtual IP addresses. This is useful in a cluster environment or in any high-availability service cnfiguration, when you need to ensure that at least …

Basic Network Configuration Under Solaris

November 26, 2005 – 1:27 pm | 7 Comments

The following document provides a general overview of the network configuration process for Solaris. For a detailed review of Solaris network configuration please see Chapter 4 of the O’Reilly Solaris 8 Administration Guide by Paul …

FTP script with nested function

November 20, 2005 – 2:14 am | One Comment

An example of an FTP script with Korn shell.

Using FTP with pipes

November 19, 2005 – 10:37 pm | 10 Comments

Pipe in Unix is a method of passing information from one command to another. The pipe take the output of the first command and sends it as input for the second command. The a second …