Using an awk script to identify dupes in two files
Hello,
I have two files. File1 or the master file contains two columns separated by a delimiter:
File 2 which is the file to be processed has only a single column
What I need is an awk script to identify unique names from file 2 which are not found in the master file
The desired output would be:
The master file is huge around 1,50,000 lines
The script I had written bu which did not work satisfactorily is as under:
# Use to match items present in 2 text databases
It does show the uniks but also spews out the non-unique words.
Any help would be most appreciated. Please help since my dictionary work is halted
Many thanks in advance,
GIMLEY
Last edited by Franklin52; 02-23-2011 at 03:26 AM..
Reason: Please use code tags, thank you
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Discussion started by: gimley
6 Replies
LEARN ABOUT MINIX
cut
CUT(1) General Commands Manual CUT(1)NAME
cut - select out columns of a file
SYNOPSIS
cut [ -b | -c] list [file...]
cut -f list [-d delim] [ -s]
OPTIONS -b Cut specified bytes
-c Select out specific characters
-d Change the column delimiter to delim
-f Select out specific fields that are separated by the
-i Runs of delimiters count as one
-s Suppres lines with no delimiter characters, when used
EXAMPLES
cut -f 2 file # Extract field 2
cut -c 1-2,5 file # Extract character columns 1, 2, and 5
cut -c 1-5,7- file # Extract all columns except 6
DESCRIPTION
[file...]" delimiter character ( see delim)" with the -f option. Lines with no delimiters are passwd through untouched"
Cut extracts one or more fields or columns from a file and writes them on standard output. If the -f flag is used, the fields are sepa-
rated by a delimiter character, normally a tab, but can be changed using the -d flag. If the -c flag is used, specific columns can be
specified. The list can be comma or BLANK separated. The -f and -c flags are mutually exclusive. Note: The POSIX1003.2 standard requires
the option -b to cut out specific bytes in a file. It is intended for systems with multi byte characters (e.g. kanji), since MINIX uses
only one byte characters, this option is equivalent to -c. For the same reason, the option -n has no effect and is not listed in this man-
ual page.
SEE ALSO sed(1), awk(9).
CUT(1)