Published at LXer:

There's a long standing argument over the differences between "open-source" software and "free" software. But, a more common error outside of software ideology circles is that you can use open-source software anyway you please. Nope. Wrong. It's never been that way. Cisco, the networking giant, should know better than this, but they've worn out the FSF's (Free Software Foundation) patience. So, Cisco is now being sued by the SFLC (Software Freedom Law Center) on behalf of the FSF for Linux and other GPL copyright violations.

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