May 202014
 

Article based on the original work of  Travis Zajkowski first posted on his blog

As first thing, this is a good definition of subner, from wikipedia:

subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of dividing a network into two or more networks is called subnetting.

All computers that belong to a subnet are addressed with a common, identical, most-significant bit-group in their IP address. This results in the logical division of an IP address into two fields, a network or routing prefix and the rest field or host identifier. The rest field is an identifier for a specific host or network interface.

The routing prefix is expressed in CIDR notation. It is written as the first address of a network, followed by a slash character (/), and ending with the bit-length of the prefix. For example, 192.168.1.0/24 is the prefix of the Internet Protocol Version 4 network starting at the given address, having 24 bits allocated for the network prefix, and the remaining 8 bits reserved for host addressing. The IPv6 address specification 2001:db8::/32 is a large address block with 296 addresses, having a 32-bit routing prefix. In IPv4 the routing prefix is also specified in the form of the subnet mask, which is expressed in quad-dotted decimal representation like an address. For example, 255.255.255.0 is the network mask for the 192.168.1.0/24 prefix. Traffic between subnetworks is exchanged or routed with special gateways called routers which constitute the logical or physical boundaries between the subnets.

The benefits of subnetting vary with each deployment scenario. In the address allocation architecture of the Internet using Classless Inter-Domain Routing (CIDR) and in large organizations, it is necessary to allocate address space efficiently. It may also enhance routing efficiency, or have advantages in network management when subnetworks are administratively controlled by different entities in a larger organization. Subnets may be arranged logically in a hierarchical architecture, partitioning an organization’s network address space into a tree-like routing structure.

When you configure a server or a service it’s useful to know what’s the complete IP Address, so there are several different Subnet Calculators available for command line use on Linux. Two popular ones are:

ipcalc
sipcalc

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May 022014
 

You could have come across the term, “cPanel” if you have been searching around for a shared Linux web hosting or logged into cPanel right now if have got a new hosting account. cPanel is a web-based tool that can help you manage the files on your website, email associated with your domain, and basically manage almost everything about your hosting. It is extremely user-friendly and can enable one to manage their hosting even if you they do not know much about web hosting.

There are several alternatives to cPanel like, Webmin, Virtualmin, and Zpanel, but cPanel simply blows its competitors out of the water, because of it user-friendly interface and features. When you sign up for a shared web hosting for your online business or personal websites, 99.9% of the time you will have cPanel to help you manage your hosting. Although, a lot of professionals like to use a console to get things done, which can give you major geek credits, for someone who is just starting out in the world of hosting, learning the basics about cPanel is probably the first step to accomplish tasks quicker.
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Apr 242014
 

Guest post by Kerry Blake

If you are planning to buy a new printer and currently using Ubuntu or Linx Mint, the 2 most popular desktop operating systems, next to Windows and OSX, you should probably buy a printer that can hand shake with your Linux box, out of the box.

Computer peripherals like printers, web cameras, scanners, and mobile Internet devices can work on your distro right away like a Mac computer. Both the Ubuntu and Mint community have been constantly adding the necessary packages to their OSs so that all the numerous hardware out there that works with Windows can also work with Linux. You shall take a look at the https://wiki.ubuntu.com/HardwareSupportComponentsPrinters recommended list of printers for Debian-based distros if you want to buy one that works with your machine without having to open the terminal. If you find your printer in this list, you can easily make it work.

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Apr 152014
 

An interesting article by Cirrus first posted on his blog

Hi

Again ill be writing about yet another TUI application, which will run with or without an X server. Those who know me are aware i prefer to use the console where possible, not because i wanna be l33t but merely because i find it does things better, faster and in many cases opens up more options/preferences than you get with the GUI counterparts. My latest find started life in or around December of 1994 as a DOS binary-only freeware. Thankfully at the tail end of 2003 someone took the time and effort to port it to Linux, and other ‘Unix like’ Operating systems.

Open Cubic Player (OCP) as mentioned will run in a TTY as well as in a graphical environment, here’s a few scrot’s of OCP

ocp02 ocp01

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Apr 022014
 

apache

Article by: Kerry Blake

Apache is the most widely used Web server on the Internet. It was developed to work in Unix environment, but was ported to other server operating system like Windows. The Apache web server serves millions of websites and web-applications. A wide range of authentication schemes and a lot of language interfaces support and security features makes it the favorite Web server of millions of users all over the globe.

The stardom and popularity also makes websites that are backed by Apache favorite target among hackers. Websites that are backed by Apache often fall prey for hack attacks not because of security risks and holes in Apache, but mainly because of poorly written code and other security issues associated with Database. Apache and Linux combination provides good security, but things might go wrong if you don’t take the measures. There are several things one need to do to secure Apache. We have compiled a list of simple things you should perform to make you Web server secure.
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