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 backup(1M)							  backup(1M)




 NAME
      backup - backup or archive file system

 SYNOPSIS
      /usr/sbin/backup [-A] [-archive] [-fsck]

 DESCRIPTION
      The backup command uses find(1) and cpio(1) to save a cpio archive of
      all files that have been modified since the modification time of
      /var/adm/archivedate on the default tape drive (/dev/update.src).
      backup should be invoked periodically to ensure adequate file backup.

      The -A option suppresses warning messages regarding optional access
      control list entries.  backup(1M) does not backup optional access
      control list entries in a file's access control list (see acl(5)).
      Normally, a warning message is printed for each file having optional
      access control list entries.

      The -archive option causes backup to save all files, regardless of
      their modification date, and then update /var/adm/archivedate using
      touch(1).

      backup prompts you to mount a new tape and continue if there is no
      more room on the current tape.  Note that this prompting does not
      occur if you are running backup from cron(1M).

      The -fsck option causes backup to start a file system consistency
      check (without correction) after the backup is complete.	For correct
      results, it is important that the system be effectively single-user
      while fsck is running, especially if -fsck is allowed to automatically
      fix whatever inconsistencies it finds.  backup does not ensure that
      the system is single-user.

      You can edit /usr/sbin/backup to customize it for your system.
      Several local values are used that can be customized:

	   BACKUPDIRS	  specifies which directories to back up recursively
			  (usually /, meaning all directories);

	   BACKUPLOG	  file name where start and finish times, block
			  counts, and error messages are logged;

	   ARCHIVE	  file name whose date is the date of the last
			  archive;

	   REMIND	  file name that is checked by /etc/profile to
			  remind the next person who logs in to change the
			  backup tape;

	   FSCKLOG	  file name where start and finish times and fsck
			  output is logged.



 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000






 backup(1M)							  backup(1M)




      You may want to make other changes, such as whether or not fsck does
      automatic correction (according to its arguments), where cpio output
      is directed, other information logging, etc.

      In all cases, the output from backup is a normal cpio archive file (or
      volume) which can be read using cpio with the c option.

    File Recovery
      backup creates archive tapes with all files and directories specified
      relative to the root directory.  When recovering files from an archive
      tape created by backup, you should be in the root directory and
      specify the directory path names for recovered files relative to the
      root directory (/).  When specifying the directory path name for file
      recovery by cpio, do not precede the leading directory name with a
      slash.  If you prefer, you can also use cpio with a -t option to
      determine how files and directories are named on the archive tape
      before attempting recovery.

 WARNINGS
      Refer to WARNINGS in cpio(1).

      When cpio runs out of tape, it sends an error to standard error and
      demands a new special file name from /dev/tty.

      To continue, rewind the tape, mount the new tape, type the name of the
      new special file at the system console, and press Return.

      If backup is being run unattended from cron(1M) and the tape runs out,
      backup terminates, leaving the find process still waiting.  Kill this
      process when you return.

 FILES
      /var/adm/archivedate	    parameterized file names

 SEE ALSO
      cpio(1), find(1), touch(1), cron(1M), fbackup(1M), frecover(1M),
      fsck(1M), acl(5).

















 Hewlett-Packard Company	    - 2 -   HP-UX Release 11i: November 2000