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.
print unpairable lines coming from file SIDE
replace missing input fields with EMPTY
-i, --ignore-case ignore differences in case when comparing fields
(obsolescent) equivalent to `-1 FIELD -2 FIELD'
(obsolescent) equivalent to `-1 FIELD'
(obsolescent) equivalent to `-2 FIELD'
-n input files are sorted numerically
obey FORMAT while constructing output line
use CHAR as input and output field separator
like -a SIDE, but suppress joined output lines
join on this FIELD of file 1
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 number
counted from 1. FORMAT is one or more comma or blank separated
specifications, each being `SIDE.FIELD' or `0'. Default FORMAT outputs
the join field, the remaining fields from FILE1, the remaining fields
from FILE2, all separated by CHAR.
Written by Mike Haertel.
Report bugs to <email@example.com>.
Copyright (C) 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
The full documentation for join is maintained as a Texinfo manual. If
the info and join programs are properly installed at your site, the
should give you access to the complete manual.
GNU textutils 2.0 July 2001 JOIN(1)
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