backup(ADM)                     19 June 1992                     backup(ADM)


 Name

    backup - performs UNIX backup functions

 Syntax

    backup [ -t ] [ -p | -c | -f files | -u "user1 [ user2 ]" ] -ddevice

    backup -h

 Description

    The UNIX backup utility is a front-end for the cpio(C) utility.  Use
    restore(ADM) to restore backups made with this utility.  It is not recom-
    mended for routine system backups; use the sysadmsh(ADM) interface for
    system backups.

    -h produces a history of backups.  Tells the user when the last complete
       and incremental/partial backups were done.

    -c complete backup.  All files changed since the system was installed are
       backed up.

    -p incremental/partial backup.  This option backs up only the files that
       have been modified since the date of the last backup.  A complete
       backup must be performed before a partial backup.

    -f backup files specified by the <files> argument.  File names may con-
       tain characters to be expanded (that is,  *, .) by the shell.  The
       argument must be in quotes.

    -u backup a user's home directory.  All files in the user's home direc-
       tory will be backed up.  At least one user must be specified but it
       can be more.  The argument must be in quotes if more than one user is
       specified.  If the user name is "all", then all the user's home direc-
       tories will be backed up.

    -d used to specify the device to be used.  It defaults to
       /dev/rdsk/f0q15d (the 1.2M floppy).

    -t used when the device is a tape.  This option must be used with the -d
       option when the tape device is specified.

    A complete backup must be done before a partial backup can be done.  Raw
    devices rather than block devices should always be used.  The program can
    handle multi-volume backups.  The program will prompt the user when it is
    ready for the next medium.  The program will give you an estimated number
    of floppies/tapes that will be needed to do the backup.  Floppies MUST be
    formatted before the backup is done.  Tapes do not need to be formatted,
    except mini-cartridge tapes.  If backup is done to tape, the tape must be
    rewound.

    xbackup is the equivalent utility for XENIX filesystems.

 See also

    restore(ADM)