This article is from a FAQ concerning SCO operating systems. While some of the information may be applicable to any OS, or any Unix or Linux OS, it may be specific to SCO Xenix, Open There is lots of Linux, Mac OS X and general Unix info elsewhere on this site: Search this site is the best way to find anything.
Go into single-user mode (NEVER try this in multi-user mode!).
Then copy something into your swap space. The suggested method
dd if=/etc/termcap of=/dev/swap count=100
Unix 3.2v4.0 and later will ask at boot up and will do this removal for you if you want it to.
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[This] reminds me of a quotation from somebody that, whenever he tried to explain the logical structure of a programming language to a programmer, it was like a cat trying to explain to a fish what it feels like to be wet. (Saul Gorn)