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Top Forums Shell Programming and Scripting awk command to compare a file with set of files in a directory using 'awk' Post 302648569 by anandek on Wednesday 30th of May 2012 05:43:02 AM
Old 05-30-2012
awk command to compare a file with set of files in a directory using 'awk'

Hi,

I have a situation to compare one file, say file1.txt with a set of files in directory.The directory contains more than 100 files.

To be more precise, the requirement is to compare the first field of file1.txt with the first field in all the files in the directory.The files in the directory will have many fields seperated by '~'.

I tried 'awk' command as below

Code:
awk -F"~" 'FILENAME=="file1.txt"{A[$1]=$1} FILENAME=="SBL_LOYALTY_SALE_TXNS*.txt"{if(A[$1]){print}}' file1.txt SBL_LOYALTY_SALE_TXNS*.txt > common.txt

This did not generate any output.

Please provide your valuable suggestions.If any modifications needed to be done in 'awk' or any other unix command will help.

Last edited by Franklin52; 05-30-2012 at 06:54 AM.. Reason: Please use code tags for data and code samples
 

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DIFF(1) 						      General Commands Manual							   DIFF(1)

NAME
diff - print differences between two files SYNOPSIS
diff [-c | -e | -C n] [-br]file1 file2 OPTIONS
-C n Produce output that contains n lines of context -b Ignore white space when comparing -c Produce output that contains three lines of context -e Produce an ed-script to convert file1 into file2 -r Apply diff recursively to files and directories of EXAMPLES
diff file1 file2 # Print differences between 2 files diff -C 0 file1 file2 # Same as above diff -C 3 file1 file2 # Output three lines of context with every diff -c file1 file2 # Same diff /etc /dev # Compares recursively the directories /etc and /dev diff passwd /etc # Compares ./passwd to /etc/passwd DESCRIPTION
the same name, when file1 and file2 are both directories" difference encountered" Diff compares two files and generates a list of lines telling how the two files differ. Lines may not be longer than 128 characters. If the two arguments on the command line are both directories, diff recursively steps through all subdirectories comparing files of the same name. If a file name is found only in one directory, a diagnostic message is written to stdout. A file that is of either block special, character special or FIFO special type, cannot be compared to any other file. On the other hand, if there is one directory and one file given on the command line, diff tries to compare the file with the same name as file in the directory directory. SEE ALSO
cdiff(1), cmp(1), comm(1), patch(1). DIFF(1)
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