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BACKUP(8)							     BACKUP(8)

NAME
       backup - backup files

SYNOPSIS
       backup [-djmnorstvz] dir1 dir2

OPTIONS
       -d   # At top level, only directories are backed up

       -j   # Do not copy junk:	 *.Z, *.bak, a.out, core, etc

       -m   # If device full, prompt for new diskette

       -n   # Do not backup top-level directories

       -o   # Do not copy *.o files

       -r   # Restore files

       -s   # Do not copy *.s files

       -t   # Preserve creation times

       -v   # Verbose; list files being backed up

       -z   # Compress the files on the backup medium

EXAMPLES
       backup -mz . /f0	   # Backup current directory compressed

       backup /bin /usr/bin
			   # Backup bin from RAM disk to hard disk

DESCRIPTION
       Backup (recursively) backs up the contents of a given directory and its
       subdirectories to another part of the file system.  It has two  typical
       uses.   First,  some portion of the file system can be backed up onto 1
       or more diskettes.  When a diskette fills up, the user is prompted  for
       a  new  one.   The  backups  are in the form of mountable file systems.
       Second, a directory on RAM disk can be backed up onto  hard  disk.   If
       the  target  directory  is empty, the entire source directory is copied
       there, optionally compressed to save space.  If the target directory is
       an  old backup, only those files in the target directory that are older
       than similar names in the source directory are replaced.	  Backup  uses
       times for this purpose, like make.  Calling Backup as Restore is equiv‐
       alent to using the -r option; this replaces newer files in  the	target
       directory  with	older  files  from the source directory, uncompressing
       them if necessary.  The target directory contents are thus returned  to
       some previous state.

SEE ALSO
       tar(1).

								     BACKUP(8)
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