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JOIN(1)				 User Commands			       JOIN(1)

       join - join lines of two files on a common field

       join [OPTION]... FILE1 FILE2

       For  each  pair of input lines with identical join fields, write a line
       to standard output.  The default join field is the first, delimited  by
       whitespace.  When FILE1 or FILE2 (not both) is -, read standard input.

       -a FILENUM
	      print  unpairable	 lines coming from file FILENUM, where FILENUM
	      is 1 or 2, corresponding to FILE1 or FILE2

       -e EMPTY
	      replace missing input fields with EMPTY

       -i, --ignore-case
	      ignore differences in case when comparing fields

       -j FIELD
	      equivalent to `-1 FIELD -2 FIELD'

       -o FORMAT
	      obey FORMAT while constructing output line

       -t CHAR
	      use CHAR as input and output field separator

       -v FILENUM
	      like -a FILENUM, but suppress joined output lines

       -1 FIELD
	      join on this FIELD of file 1

       -2 FIELD
	      join on this FIELD of file 2

       --help display this help and exit

	      output version information and exit

       Unless -t CHAR  is  given,  leading  blanks  separate  fields  and  are
       ignored,	 else fields are separated by CHAR.  Any FIELD is a field num‐
       ber counted from 1.  FORMAT is one or more  comma  or  blank  separated
       specifications, each being `FILENUM.FIELD' or `0'.  Default FORMAT out‐
       puts the join field, the remaining fields  from	FILE1,	the  remaining
       fields from FILE2, all separated by CHAR.

       Important:  FILE1  and  FILE2 must be sorted on the join fields.	 E.g.,
       use `sort -k 1b,1' if `join' has no options.

       Written by Mike Haertel.

       Report bugs to <>.

       Copyright © 2006 Free Software Foundation, Inc.
       This is free software.  You may redistribute copies  of	it  under  the
       terms	   of	    the	     GNU      General	   Public      License
       <>.	There is NO WARRANTY,  to  the
       extent permitted by law.

       The  full documentation for join is maintained as a Texinfo manual.  If
       the info and join programs are properly installed  at  your  site,  the

	      info join

       should give you access to the complete manual.

join 6.4			 October 2006			       JOIN(1)

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