commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
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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:
Batch rename extension of all files in a folder, in the example from .txt to .md
Create an ISO Image from a folder and burn it to CD (Os X)
Split File in 19 MB big parts, putting parts together again via
cat Nameforpartaa Nameforpartab Nameforpartac >> File
finding all files with the metadata tag "data" using the metadata find command mdfind , writing the list to a temporary file, reading the input for the .zip file from this temporary file.
Converts a .pdf to .jpg . should work with jpeg | tiff | png | gif | jp2 | pict | bmp | qtif | psd | sgi | tga