"We are 100% committed to revoking the licence. We have the licence rights and IBM acknowledges what is on the line here," said Darl McBride, SCO Group's chief executive.
SCO, which acquired the source code and licensing rights to Unix System V technology - the basis of all commercial versions of Unix - in 1995, has accused IBM of misappropriating trade secrets, unfair competition and breach of contract. SCO claimed IBM channelled parts of its proprietary Unix code into the open source community, undermining demand for Unix.
"We think Linux is great but it is not going to happen at the expense of Unix," said McBride. He admitted revoking IBM's Unix licence would "create a bit of a pickle" for AIX users.