join(1) -- Linux man page
NAMEjoin - join lines of two files on a common field
SYNOPSISjoin [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
- 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 `FILENUM.FIELD' or `0'. Default FORMAT outputs the join field, the remaining fields from FILE1, the remaining fields from FILE2, all separated by CHAR.
AUTHORWritten by Mike Haertel.
REPORTING BUGSReport bugs to <email@example.com>.
COPYRIGHTCopyright © 2004 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 PURPOSE.
SEE ALSOThe 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 coreutils join
should give you access to the complete manual.