The Open Systems Interconnection (OSI) layer model is a way of describing communications by computer systems over networks. The goal is to set a standard for how communicating over a network should look. The OSI model is not protocol specific, but instead different protocols belong in different layers. The layering of communication protocols allows for…
Changing the file extension for multiple files in a Linux directory is easy. If you need to add something to the end of every filename in a directory or if you want to remove text from the end of a filename in a directory you can use a simple bash loop. A bash loop will…
As technology continues to advance, the role of a system administrator has evolved beyond traditional tasks of managing servers and networks. Today, system administrators are expected to possess programming skills to automate tasks, streamline operations, and enhance overall efficiency. With a plethora of programming languages available, it can be overwhelming to determine which one is…
Vim/Vi is a powerful text editor that is installed on every Unix style operating system. The beauty of Vim is that you do not have to take your hands off the keyboard to navigate. Everything you could ever want to do can be accomplished by key strokes. This speeds up text editing, but the real…
The cheapest domain name registrars compared. Find the best price for your domain. I want a… .com .org .net Other.club.co.info.io.me.ninja.ru.xxx I want the best price for… Registration Renewal Transfer 5 Year Value 1 & 1 $0.99 99 cents domain registration for the first year. $14.99 thereafter GoDaddy $0.99 Normally 2.99 for the first year. $14.99 thereafter. WHOIS privacy is $7.99/year. No email…
A looking glass server is a tool provided by networks, usually larger Internet service providers (ISPs), which allows users to see what the Internet looks like from the point of view of the routers within that particular network. A looking glass is a crucial tool for diagnosing Internet related networking issues. It is also extremely…
Xxdiff is a great visual diff tool. You can set it up so that whenever you typegit xxdiffin a git branch, you will see all the changes you made since the last commit. These instructions are meant for setting up xxdiff on a Mac. First download xxdiff here. Copy the above into your Mac’s Applications directory….
Internet service providers use network maps as a way to show potential customers where their network has a point of presence. These points of presence (POPs) are locations at which the network has a core router and sells their service. A network map is useful in quickly displaying the geographic size of a network along with…
When working with computer hardware, a proper set of precision screwdrivers is essential. Investing in a good screw driver and a good set of wide-ranging screwdriver bits will save you time and make working with hardware easier. The iFixit 64 bit driver kit should be perfect for just about any electronics repair project. This includes repairing iPhones,…
The Juniper Networks Certified Associate – Junos (JNCIA-Junos) is a entry level certificate from Juniper Networks. It is a great certificate to have if you are looking to advance your networking career. The JNCIA is sometimes overshadowed by Cisco’s CCNA. Because the JNCIA is less common, having this certificate will make you stand out from the crowd…