BGP is the protocol used to talk between networks. It is the protocol of the Internet. To connect your network to other networks you will likely use BGP or have your uplink provide you with a gateway IP address. BGP is not needed to connect to the Internet or to other networks, but it is…
Vim with plugins is a popular IDE option. The reason most people stay away from Vim is the steep learning curve. Most of Vim’s power comes from all the key bindings you have to learn. Just saving and exiting a file can be a daunting task for someone who have never used the text editor…
The first server listing in the nginx configuration will be the default action for all domain name requests to that server. This will be true unless a server action is labeled default_server. This means that the server might render a website for any domain name that is requested from nginx. To prevent this behavior you must…
BGP uses different metrics to select which path to send data. This is how BGP chooses paths. Attribute Description/Notes Winning Metric Weight local to the router Highest LOCAL_PREF Within the ASN, 100 by default Highest Locally Originated Local paths that are sourced by the network or redistribute commands are preferred over local aggregates that are…
Also see this vim maze game. This vim/vi game covers basic movement commands. I highly recommend starting with some basic commands and then just using vim to edit files. As you progress and learn the basics you can begin to add more advances vim commands. Learning vim is a process that should be taken in steps….
Given a valid IPv6 address, this generator returns a regular expression which will match all valid forms of that IPv6 address. This includes compact forms, canonical forms and all other ways of writing the Ipv6 address. An IPv6 address regex is a regular expression pattern used to validate and match IPv6 addresses in text strings….
Border Gateway Protocol (BGP) is the protocol of the Internet. It is the main external gateway protocol used to connect separate networks to one another. This article provides an easy to understand introduction to BGP and how it is used to shape traffic. It describes how BGP is used to ensure that the Internet is…
Making regular backups is crucial for any system administrator. Terrible things happen and data gets lost. This may be due to hackers, programing errors, hardware failures or bugs in new code. If you have a website, you need a backup. There are WordPress plugins which automatically create backups for you. Backing up a WordPress database…
OHosti is the first result I found when I put “free VPS” into google. I checked out their website, and man, it looks slick. The site looks professional and well put together. It also looks like they offer a ton of stuff, all for free. If something sounds too good to be true, then it…
Websites are made up of HTML, which is a form of XML. XPath is a syntax for selecting sections of XML. It is useful for scraping websites. One of the most popular uses for XPath can be found within the lxml library of Python. There are other libraries and programs that allow you to scrape…