Pluckeye is a self-control tool. It's sort of similar to Cold Turkey. It can help you prevent yourself from visiting certain websites; you choose which ones.
Much of Pluckeye's configuration can be done by pointing and clicking. But some of its features can only be accessed using the command line. The command line can be confusing. How can you enter Pluckeye command-line commands?
(Disclaimer: I'm one of the moderators of the Pluckeye sub-Reddit; this is a discussion forum hosted at reddit.com.)