COMMSection: User Commands (1)
Updated: February 2017
Index | Return to Main Contents
NAMEcomm - compare two sorted files line by line
SYNOPSIScomm [,OPTION/]... ,FILE1 FILE2/
Compare sorted files FILE1 and FILE2 line by line.
When FILE1 or FILE2 (not both) is -, read standard input.
With no options, produce three-column output. Column one contains lines unique to FILE1, column two contains lines unique to FILE2, and column three contains lines common to both files.
- suppress column 1 (lines unique to FILE1)
- suppress column 2 (lines unique to FILE2)
- suppress column 3 (lines that appear in both files)
- check that the input is correctly sorted, even if all input lines are pairable
- do not check that the input is correctly sorted
- separate columns with STR
- -z, --zero-terminated
- line delimiter is NUL, not newline
- display this help and exit
- output version information and exit
- comm -12 file1 file2
- Print only lines present in both file1 and file2.
- comm -3 file1 file2
- Print lines in file1 not in file2, and vice versa.
AUTHORWritten by Richard M. Stallman and David MacKenzie.
REPORTING BUGSGNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report comm translation bugs to <http://translationproject.org/team/>
COPYRIGHTCopyright © 2016 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.
SEE ALSOjoin(1), uniq(1)
Full documentation at: <http://www.gnu.org/software/coreutils/comm>
or available locally via: info '(coreutils) comm invocation'
Return to Main Contents