Name
comm
Synopsis
comm [options
]file1
file2
Compares lines common to the sorted files file1
and file2. Three-column output is produced:
lines unique to file1, lines unique to
file2, and lines common to both
files. comm
is similar to
diff
in that both commands compare two files. In
addition, comm
can be used like
uniq
; that is, comm
selects
duplicate or unique lines between two sorted
files, whereas uniq
selects duplicate or unique
lines within the same sorted file.
Options
-
-
Read the standard input.
-
-1
Suppress printing of Column 1.
-
-2
Suppress printing of Column 2.
-
-3
Suppress printing of Column 3.
-
-12
Print only lines in Column 3 (lines common to file1 and file2).
-
-13
Print only lines in Column 2 (lines unique to file2).
-
-23
Print only lines in Column 1 (lines unique to file1).
Example
Compare two lists of top-10 movies and display items that appear in both lists:
comm -12 shalit_top10 maltin_top10
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