Command: clear ip route Function: Removes all entries from the IP routing table. Syntax: clear ip route [<address> | <network> | <wildcard> | <all>] Parameters: <address>: Specifies the IP address of the route that you want to remove. <network>: Specifies the network address of the route that you want to remove. <wildcard>: Specifies the wildcard mask of…
Iperf is a tool used to measure bandwidth limits. There’s a number of public iperf servers you can test to, but some require version 3 of the iperf program. This can be a bit tricky as Ubuntu seems to have version 2 of iperf in their default repository list. Here are two ways to install iperf version…
A Japanese virtual private server (VPS) is a great idea if you need a server that is largely going to be accessed by Asian users. Japan is a stable, well developed country with fast Internet speeds. Unlike China and certain other Asian countries, Japan allows free compute usage, so government permits and censorship should not…
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…
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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….