BU(9)
NAME
bu - back up utility
SYNOPSIS
bu
DESCRIPTION
Bu is intended to be used for backing up a large tree
of files onto a floppy diskette which can only hold a smaller tree of files.
When invoked bu will prompt the user to insert a diskette.
The program starts walking the file tree starting at the current directory.
As it walks the tree it makes a list of the files and keeps track of their sum.
When the cumulative size of the files is greater than the capacity
of the installed diskette the files are tar'd' to the diskette. The program
than prompts the user to install another diskette.
When a diskette is installed mkfs and fsck is executed to make it clean.
Bu automatically detects single or double sided diskettes.
The backup device is assumed to be fd00. A directory, /bck must exist which
will be used to mount fd00.
The protection bits for bu should be set to rwsr-xr-x(chmod 4755 bu).