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Top Forums Shell Programming and Scripting To cut entire column from a file and apend it to another file as another column Post 302187928 by matrixmadhan on Tuesday 22nd of April 2008 09:00:52 AM
Old 04-22-2008
in a single command
Code:
awk 'BEGIN{ while ( getline < "secondfile" ) { arr[i++]=$0 } }{ print arr[j++], $1 }' firstfile

 

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COMM(1) 							   User Commands							   COMM(1)

NAME
comm - compare two sorted files line by line SYNOPSIS
comm [OPTION]... FILE1 FILE2 DESCRIPTION
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. -1 suppress column 1 (lines unique to FILE1) -2 suppress column 2 (lines unique to FILE2) -3 suppress column 3 (lines that appear in both files) --check-order check that the input is correctly sorted, even if all input lines are pairable --nocheck-order do not check that the input is correctly sorted --output-delimiter=STR separate columns with STR --total output a summary -z, --zero-terminated line delimiter is NUL, not newline --help display this help and exit --version output version information and exit Note, comparisons honor the rules specified by 'LC_COLLATE'. EXAMPLES
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. AUTHOR
Written by Richard M. Stallman and David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report comm translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 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 ALSO
join(1), uniq(1) Full documentation at: <http://www.gnu.org/software/coreutils/comm> or available locally via: info '(coreutils) comm invocation' GNU coreutils 8.28 January 2018 COMM(1)
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