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 compar
ing fields
-j FIELD
(obsolescent) equivalent to `-1 FIELD -2 FIELD'
-j1 FIELD
(obsolescent) equivalent to `-1 FIELD'
-j2 FIELD
(obsolescent) equivalent to `-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
tions. There is NO warranty; not even for MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
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.
join (coreutils) 4.5.8 February 2003 JOIN(1)
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