SCO Unix, Xenix and ODT General FAQ

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.

This is an ancient post with no relevance to modern systems.

Ordinarily installing the patches without rebooting will cause no problem.

However, at the very least you should do a btmnt -w and make an extra copy of unix.old at each relinking step. If everything goes well, you can come back and remove the extra kernels later.

The problem is that every patch that relinks copies the existing /stand/unix to /stand/unix.old, overwriting unix.old. Since you never tried that unix, it could be bad, and now you'd have no good unix.old to fall back on.

So, extra copies of a known working unix are good. You could just make one (unix.good) but then you wouldn't know at which step you had a problem if it did fail.

General procedure:

  • (install that relinks)
  • btmnt -w
  • cp /stand/unix.old /stand/unix.old1
  • btmnt -d:
  • (repeat to .old2 .old3 etc.)

Note you need to copy these to /stand- it will do you no good to copy to any other filesystem.

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