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.
also print unpairable lines from file FILENUM, where FILENUM is
1 or 2, corresponding to FILE1 or FILE2
replace missing input fields with EMPTY
ignore differences in case when comparing fields
equivalent to '-1 FIELD -2 FIELD'
obey FORMAT while constructing output line
use CHAR as input and output field separator
like -a FILENUM, but suppress joined output lines
join on this FIELD of file 1
join on this FIELD of file 2
check that the input is correctly sorted, even if all input
lines are pairable
do not check that the input is correctly sorted
treat the first line in each file as field headers, print them
without trying to pair them
--help display this help and exit
output version information and exit
Unless -t CHAR is given, leading blanks separate fields and are
joined, a warning message will be given.
Written by Mike Haertel.
Report join bugs to email@example.com
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report join translation bugs to <http://translationproject.org/team/>
Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
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 coreutils 'join invocation'
should give you access to the complete manual.
GNU coreutils 8.21 March 2016 JOIN(1)
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