A custom spin is a version of the Linux operating system that has each package selected or deselected by the creator of the custom spin. This can be quite useful if you want to install any build of any flavor of Linux, exactly the same way on numerous machines. If you want two or more systems to have the exact same kernel, OS, server software, development environment and applications then a custom spin is a way to save significant time and effort. Imagine a USB drive that has everything you need. You can install EXACTLY the programs you want and need, without a single download. Then envision that you can actually boot from that USB drive. This is what a LiveUSB is all about. I can carry my Operating system and software on my key chain. If one of my clients has an issue with their computer, I can boot to my USB drive and test their computer’s hardware, verify their Internet connection, and even troubleshoot Windows disk errors without ever adding a single file or setting to their system. I can make an exact duplicate of any Fedora system to the USB drive. I can then install that exact same OS with everything on any computer anywhere. Or I can just boot to that exact environment and see if I really like the way it works before I install it on any system.
If you are experiencing really slow web browsing but downloads seem to be at normal speed, you may be a victim of a DNS (domain name service) cache poisoning attack. This can affect any operating system connected to the Internet. Many of my professional clients have been impacted by this recently. It is becoming a common issue. The simple test to see if you are being impacted is to download a file from a known source such as Microsoft or Apple. If the download proceeds normal speed, but web browsing is slow and sluggish, you may be affected.
On windows based systems:
Open a command prompt and type in “ipconfig /flushdns” without the quotes. Press enter. To prevent future issues you can disable the DNS client service in the Admin Tools–> Services section.
On Mac systems:
Leopard and newer
Open a bsh shell prompt and type in “dnscacheutil -flushdns” without the quotes.
Earlier than 10.5.2
Open a bsh shell prompt and type in “lookupd -flushcache” without the quotes.
On Nix systems:
From a console with root priveledges “/etc/init.d/nscd.restart” without the quotes. G/K/Ubuntu users “su /etc/init.d/nscd.restart” without the quotes.
Most security programs have no mechanism to prevent this from occurring. I do recommend ESET’s Smart Security Suite for Windows. It will prevent this issue.