From: utzoo!decvax!genrad!wjh12!hscvax!walsh
Newsgroups: net.unix-wizards
Title: Incremental Backup
Article-I.D.: hscvax.109
Posted: Thu Apr 14 15:50:57 1983
Received: Mon Apr 18 21:41:02 1983


MTBACKUP(8H)        UNIX Programmer's Manual         MTBACKUP(8H)

NAME
     mtbackup - incremental file system dump

SYNOPSIS
     /privbin/mtbackup [ -daily -weekly -monthly ] [ -tell ]

DESCRIPTION
     _M_t_b_a_c_k_u_p copies to magnetic tape all files on all currently
     mounted filesystems changed after a certain date.  Its
     method of doing this is by exec'ing (2) /privbin/mtb (8).

     Mtbackup's purpose in life is to run mtb with the proper
     argument.  Mtbackup, after finding out the date, will run a
     monthly backup if the time is between noon the first of a
     month and noon on the second.  Otherwise, if the time lies
     between noon Thursday and noon Friday, a weekly backup is
     performed.  If none of the above two cases holds, a daily
     backup is performed.

     A particular type of backup may be forced by using the
     appropriate switch.

     The "-tell" switch tells when the last type of the various
     kinds of backup was done.

     Please avoid forcing a particular kind of backup.  Let the
     program make the decisions.

SEE ALSO
     mtb(8H)

Printed 4/14/83                                                 1

MTB(8H)             UNIX Programmer's Manual              MTB(8H)

NAME
     mtb - incremental file system dump

SYNOPSIS
     /privbin/mtb [ -daily -weekly -monthly -semester ]

DESCRIPTION
     _M_t_b copies to magnetic tape all files on all currently
     mounted filesystems changed after a certain date.  The date
     after which all modified files are dumped is the date of the
     last more inclusive dump.  For example, files place on a
     daily dump tape are those changed since the last weekly was
     completed.

SWITCHES
     [-verbose]

     This switch causes the program to list the files as they are
     placed on the tape.

     [-from pathname]

     This switch forces mtb not to dump files who come alphabeti-
     cally before pathname.  It can be used to resume a backup if
     for some reason a tape was imporperly written, didn't com-
     plete, or if the mtb process died.  You simply restart mtb
     using the file that was to be the first file on the aborted
     tape as the argument to from.

     [-nice]

     Causes mtb to give itself a slightly better priority to do
     the job quicker.

     [-root pathname]

     Normally mtb descends the directory tree starting at "/".
     This substitutes a different tree on which to perform
     backup.

SIGNALS AND MTB
     When mtb receives a SIGTERM (15), it prints out on the con-
     sole what files it is currently dumping.

SEE ALSO
     mtbackup(8H)

Printed 4/14/83                                                 1

RETRIEVE(1H)        UNIX Programmer's Manual         RETRIEVE(1H)

NAME
     retrieve - recover files from incremental backup

SYNOPSIS
     /usr/bin/retrieve

DESCRIPTION
     _R_e_t_r_i_e_v_e extracts files from a tape written by mtb(8).  The
     format of a backup tape written by mtb is different from
     that written by dump(8), tar(1), tp(1), or standard ansi
     format.

SWITCHES
     [-verbose]

     This switch causes the program to list the files as they are
     extracted from the tape.

     [-confirm]

     Lists each file before it is extracted and asks if you
     really want to extract it.

     [-fi pathname]

     List all files on the tape whose path starts with pathname.

     [-dir pathname]

     Lists all the files with more complete directory informa-
     tion.

     [-extract] [file1 ...]

     Extracts the named files from the tape.

     [-short]

     When used with -extract, the files are not put in their ori-
     ginal paths, but in the current directory.  No subdirec-
     tories are used.  All files are put in the current direc-
     tory.

     [-tree tpath]

     Turns off the short switch.  The specified files are
     extracted to the current directory with the initial segment
     (tpath) of their full pathname removed.  For example,
     retrieve -extract -tree /fs/b/ /fs/b/dyer/misc/
     would extract the files "/fs/b/dyer/misc/*" into the current
     directory as "dyer/misc/*".  Subdirectories are used, in
     contrast to the -short switch.

Printed 4/9/83                                                  1

RETRIEVE(1H)        UNIX Programmer's Manual         RETRIEVE(1H)

SEE ALSO
     mtbackup(8)

Printed 4/9/83                                                  2