Bash

With a list of servers, it is common that one or more are down or crash. Lots cluster management tools can detect the aliveness of servers. However, it can be ... read more »

I frequently run some commands/scripts on a batch of servers whose IPs are already collected in a file. I usually use a simple loop and call the ssh to run ... read more »

The mailx or mail command in Linux is still providing service for guys like me, especially when we need to send email automatically by script. gmail is great. Now, how ... read more »

Different Linux distros have different method to set the hostname. On Fedora Linux, it is quite simple. Open the /etc/sysconfig/network file vim /etc/sysconfig/network Find the line starting with HOSTNAME= Assign the hostname for this computer ... read more »

This post compiles a list of tutorials on the Internet for Linux beginners. Linux beginners usually get headache from the “seemed” complexity of the Linux operation system. But once they ... read more »

Advanced Bash-Scripting Guide – An in-depth exploration of the art of shell scripting by Mendel Cooper Link here: http://www.tldp.org/LDP/abs/html/index.html read more »

There is various network configuration information in Linux and lots tools can be used to find out those configuration information. Finding out these network information in Fedora Linux as the ... read more »

How to find out Linux and Windows uptime is introduced in this post. Linux uptime Linux uptime can be easily found out by the uptime command: $ uptime 22:19:29 up 10 days, 22:26,  5 ... read more »

ns is a discrete-event network simulator targeted primarily for research and educational use. There are two version of ns, ns-2 and ns-3, which are quite different with each other in ... read more »