backup_setexp - Sets the expiration date for existing dump levels.


backup setexp -dump <dump level name>+ [-expires <expiration date>+] [-localauth] [-cell <cell name>] [-help]

backup se -d <dump level name>+ [-e <expiration date>+] [-l] [-c <cell name>] [-h]


The backup setexp command sets or changes the expiration date associated with each specified dump level, which must already exist in the dump hierarchy.

Use the -expires argument to associate an expiration date with each dump level. When the Backup System subsequently creates a dump at the dump level, it uses the specified value to derive the dump's expiration date, which it records on the label of the tape (or backup data file). The Backup System refuses to overwrite a tape until after the latest expiration date of any dump that the tape contains, unless the backup labeltape command is used to relabel the tape. If a dump level does not have an expiration date, the Backup System treats dumps created at the level as expired as soon as it creates them.

(Note that the Backup System does not automatically remove a dump's record from the Backup Database when the dump reaches its expiration date, but only if the tape that contains the dump is recycled or relabeled. To remove expired and other obsolete dump records, use the backup deletedump command.)

Define either an absolute or relative expiration date:

If the command is used to change an existing expiration date associated with a dump level, the new date applies only to dumps created after the change. Existing dumps retain the expiration date assigned at the time they were created.


-dump <dump level name>+

Specifies the full pathname of each dump level to assign the expiration date specified by the -expires argument.

-expires <expiration date>+

Defines the absolute or relative expiration date to associate with each dump level named by the -dump argument. Absolute expiration dates have the following format:

   [at] {NEVER | <mm>/<dd>/<yyyy> [<hh>:<MM>] }

where the optional word at is followed either by the string NEVER, which indicates that dumps created at the dump level never expire, or by a date value with a required portion (<mm> for month, <dd> for day, and <yyyy> for year) and an optional portion (<hh> for hours and <MM> for minutes).

Omit the <hh>:<MM> portion to use the default of midnight (00:00 hours), or provide a value in 24-hour format (for example, 20:30 is 8:30 p.m.). Valid values for the year range from 1970 to 2037; higher values are not valid because the latest possible date in the standard UNIX representation is in February 2038. The command interpreter automatically reduces later dates to the maximum value.

Relative expiration dates have the following format:

   [in] [<years>y] [<months>m] [<days>d]

where the optional word in is followed by at least one of a number of years (maximum 9999) followed by the letter y, a number of months (maximum 12) followed by the letter m, or a number of days (maximum 31) followed by the letter d. If providing more than one of the three, list them in the indicated order. If the date that results from adding the relative expiration value to a dump's creation time is later than the latest possible date in the UNIX time representation, the Backup System automatically reduces it to that date.


Constructs a server ticket using a key from the local /usr/afs/etc/KeyFile file. The backup command interpreter presents it to the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the -cell argument. For more details, see backup(8).

-cell <cell name>

Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see backup(8).


Prints the online help for this command. All other valid options are ignored.


The following example associates an absolute expiration date of 10:00 p.m. on 31 December 1999 with the dump level /1998/december:

   % backup setexp -dump /1998/december -expires at 12/31/1999 22:00

The following example associates a relative expiration date of 7 days with the two dump levels /monthly/week1 and /monthly/week2:

   % backup setexp -dump /monthly/week1 /monthly/week -expires 7d


The issuer must be listed in the /usr/afs/etc/UserList file on every machine where the Backup Server is running, or must be logged onto a server machine as the local superuser root if the -localauth flag is included.


backup(8), backup_adddump(8), backup_deldump(8), backup_listdumps(8)


IBM Corporation 2000. <> All Rights Reserved.

This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.