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Compare two Tomcat installations using rsync

Lets assume you manage multiple servers that host Java web applications using the Tomcat web server.

To quickly compare the Tomcat installations on host1 and host2, we can use the “dry-run” mode of the… 133 more words

Coding

Install Node.js 4.4.2 on Ubuntu, Debain

Node.js is an open source, it’s a lightweight and efficient cross-platform  runtime environment for server-side and designed to build scalable network applications.

This post demonstrates how to install node js in your Ubuntu or Debian, 89 more words

Ubuntu

How to Install HAProxy on Ubuntu, Debian

HAProxy is an open source, it’s a very fast and reliable solution for Load balancing, high availability and proxying for TCP and HTTP. This is very helpful for high traffic websites and the most visited ones. 450 more words

Ubuntu

Structure of UNIX/Linux

This post follows on from the History of Linux.

 Operating system: The Kernel

UNIX is a layered operating system. The innermost layer is the hardware itself that provides the services for the OS. 1,400 more words

UNIX

History of Unix

XIn the stone age of computers (1950-60s) computer systems were big (size of a living room, weighing over 20 tons), cumbersome to use: every program was able to perform limited tasks – one at a time – only, written for a specific computer, manually typed in via the engineering control panel in that computer’s assembly language; if a business upgraded to a bigger, better computer the old OS wouldn’t work on the new one and every data had to be entered into the new machine again. 632 more words

Security