commandlinefu.com is the place to record those command-line gems that you return to again and again.
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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
This will download all files of the type specified after "-A" from a website. Here is a breakdown of the options:
-r turns on recursion and downloads all links on page
-l1 goes only one level of links into the page(this is really important when using -r)
-H spans domains meaning it will download links to sites that don't have the same domain
-nd means put all the downloads in the current directory instead of making all the directories in the path
-A mp3 filters to only download links that are mp3s(this can be a comma separated list of different file formats to search for multiple types)
-e robots=off just means to ignore the robots.txt file which stops programs like wget from crashing the site... sorry http://example/url lol..