Published at LXer:

Solaris 10, the official stable version of Sun's UNIX operating system, is no longer available to users at no cost. Oracle has adjusted the terms of the license, which now requires users to purchase a service contract in order to use the software. Sun's policy was that anyone could use Solaris 10 for free without official support. Users could get a license entitling them to perpetual commercial use by filling out a simple survey and giving their e-mail address to Sun. Oracle is discontinuing this practice, and is repositioning the free version as a limited-duration trial.

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