Replace All Colons From Filenames With Terminal

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http://askubuntu.com – I have a GB's worth of music on my HDD that was formatted with EXT4. I want to move these files to a FAT formatted HDD partition. However, I can't move most of my files because they have ":" in the names (For example, "Act 2: ....." for operas). Is there a way with command line to rename all of my files from "XXXX:XXXX" to "XXXX-XXXX"? (HowTos)