Provided by: coreutils_5.93-5ubuntu4_i386 bug

NAME

       join - join lines of two files on a common field

SYNOPSIS

       join [OPTION]... FILE1 FILE2

DESCRIPTION

       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

       --version
              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
       number  counted from 1.  FORMAT is one or more comma or blank separated
       specifications, each being  ‘FILENUM.FIELD’  or  ‘0’.   Default  FORMAT
       outputs  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.

AUTHOR

       Written by Mike Haertel.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright © 2005 Free Software Foundation, Inc.
       This is free software.  You may redistribute copies  of  it  under  the
       terms       of       the      GNU      General      Public      License
       <http://www.gnu.org/licenses/gpl.html>.  There is NO WARRANTY,  to  the
       extent permitted by law.

SEE ALSO

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

              info join

       should give you access to the complete manual.