Sponsored Content
Full Discussion: How to compare 2 files.
Top Forums Shell Programming and Scripting How to compare 2 files. Post 302247254 by ashoka123 on Wednesday 15th of October 2008 09:19:10 AM
Old 10-15-2008
iam new to shell script, & i tried the below code.
#!/bin/bash
#To compare the password file
echo "File comparision"
awk -F';' 'BEGIN{while(getline<"file1") a[$1]=2};a[$1]!=2' file2> listdifference

cksum file1 | awk '{print$1}' > x
cksum file2 | awk '{print$1}' > y
x=`cat x`
y=`cat y`

function test
{
if [ $x -le $y ]
then
echo "First file x is smaller. Add difference into smaller file x and remove the difference."

paste -d"\n" listdifference file1 | sort | uniq > lists
awk NF lists > listfinal

while read difference
do
echo "Deleting line $difference"
#sed "/$difference/d" listfinal > output
sed -e "s/$difference//g" listfinal > output
done < listdifference
else
echo "Second file y is bigger. Add line into x."
fi
}
test

--------------
after running the above script i got the below list to the listdifference file.
yellow:sujji
blue:summi
orange:girri
red:akash
white:alias

but i need is if any changes are made in the file2 that has the entries in file1 i need to replace that entry in file1 with the value of file2.

ex: in file1 we have an entry called 'yellow:sure' if i changed the value of the same in file2 to 'yellow:somethingelse' then it has to replace with the same in file1 for the value of 'yellow:sure' .
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

compare two files

I have file1 and file2: file1: 11 xxx kksd ... 22 kkk kdsglg... 33 sss kdfjdksa... 44 kdsf dskjfkas ... hh kdkf kdkkd.. jg dkf dfkdk ... ... file2: jg 22 hh ... I need to check each line of file1. if the field one is in file2, I will keep it; if not, the whole line will be... (17 Replies)
Discussion started by: fredao
17 Replies

2. Shell Programming and Scripting

compare two files and to remove the matching lines on both the files

I have two files and need to compare the two files and to remove the matching lines from both the files (4 Replies)
Discussion started by: shellscripter
4 Replies

3. Shell Programming and Scripting

compare files in two directories and output changed files to third directory

I have searched about 30 threads, a load of Google pages and cannot find what I am looking for. I have some of the parts but not the whole. I cannot seem to get the puzzle fit together. I have three folders, two of which contain different versions of multiple files, dist/file1.php dist/file2.php... (4 Replies)
Discussion started by: bkeep
4 Replies

4. Shell Programming and Scripting

How to compare 2 files & get only few columns based on a condition related to both files?

Hiiiii friends I have 2 files which contains huge data & few lines of it are as shown below File1: b.dat(which has 21 columns) SSR 1976 8 12 13 10 44.00 39.0700 70.7800 7.0 0 0.00 0 2.78 0.00 0.00 0 0.00 2.78 0 NULL ISC 1976 8 12 22 32 37.39 36.2942 70.7338... (6 Replies)
Discussion started by: reva
6 Replies

5. Shell Programming and Scripting

Compare 2 folders to find several missing files among huge amounts of files.

Hi, all: I've got two folders, say, "folder1" and "folder2". Under each, there are thousands of files. It's quite obvious that there are some files missing in each. I just would like to find them. I believe this can be done by "diff" command. However, if I change the above question a... (1 Reply)
Discussion started by: jiapei100
1 Replies

6. Shell Programming and Scripting

Require compare command to compare 4 files

I have four files, I need to compare these files together. As such i know "sdiff and comm" commands but these commands compare 2 files together. If I use sdiff command then i have to compare each file with other which will increase the codes. Please suggest if you know some commands whcih can... (6 Replies)
Discussion started by: nehashine
6 Replies

7. Shell Programming and Scripting

Compare files

Please help me with awk.I have two files with the below details file1 123456789 2012 987654321 2011 a1234567892012 a1234abcde2012 b1234567892012 c1234567892012 98765a12342012 file2 a1234 01234 b1234 33333 I need to check whether the items in file2 is present in file1 .If it is... (2 Replies)
Discussion started by: Mary James
2 Replies

8. Shell Programming and Scripting

Compare two files, then overwrite first file with only that in both files

I want to compare two files, and search for items that are in both. Then override the first file with that containing only elements which were in both files. I imagine something with diff, but not sure. File 1 One Two Three Four Five File 2 One Three Four Six Eight (2 Replies)
Discussion started by: castrojc
2 Replies

9. Shell Programming and Scripting

Compare multiple files, and extract items that are common to ALL files only

I have this code awk 'NR==FNR{a=$1;next} a' file1 file2 which does what I need it to do, but for only two files. I want to make it so that I can have multiple files (for example 30) and the code will return only the items that are in every single one of those files and ignore the ones... (7 Replies)
Discussion started by: castrojc
7 Replies

10. Shell Programming and Scripting

Compare files and share output from both files

hi all, Thanks to all for your great help... I have a scenario that I have two files (file1 & file2). I need to compare two files entire row by row and share the output if any discrepancies within two files. File1: DB1|TB1|C1,C3 DB2|TB2|C1,C2 DB3|TB3|C1,C2,C3,C4 File2: ... (2 Replies)
Discussion started by: Selva_2507
2 Replies
ARRAY_SPLICE(3) 							 1							   ARRAY_SPLICE(3)

array_splice - Remove a portion of the array and replace it with something else

SYNOPSIS
array array_splice (array &$input, int $offset, [int $length], [mixed $replacement = array()]) DESCRIPTION
Removes the elements designated by $offset and $length from the $input array, and replaces them with the elements of the $replacement array, if supplied. Note that numeric keys in $input are not preserved. Note If $replacement is not an array, it will be typecast to one (i.e. (array) $parameter). This may result in unexpected behavior when using an object or NULL$replacement. PARAMETERS
o $input - The input array. o $offset - If $offset is positive then the start of removed portion is at that offset from the beginning of the $input array. If $offset is negative then it starts that far from the end of the $input array. o $length - If $length is omitted, removes everything from $offset to the end of the array. If $length is specified and is positive, then that many elements will be removed. If $length is specified and is negative then the end of the removed portion will be that many elements from the end of the array. If $length is specified and is zero, no elements will be removed. Tip: to remove everything from $offset to the end of the array when $replacement is also specified, use count($input) for $length. o $replacement - If $replacement array is specified, then the removed elements are replaced with elements from this array. If $offset and $length are such that nothing is removed, then the elements from the $replacement array are inserted in the place specified by the $offset. Note that keys in replacement array are not preserved. If $replacement is just one element it is not necessary to put array() around it, unless the element is an array itself, an object or NULL. RETURN VALUES
Returns the array consisting of the extracted elements. EXAMPLES
Example #1 array_splice(3) examples <?php $input = array("red", "green", "blue", "yellow"); array_splice($input, 2); // $input is now array("red", "green") $input = array("red", "green", "blue", "yellow"); array_splice($input, 1, -1); // $input is now array("red", "yellow") $input = array("red", "green", "blue", "yellow"); array_splice($input, 1, count($input), "orange"); // $input is now array("red", "orange") $input = array("red", "green", "blue", "yellow"); array_splice($input, -1, 1, array("black", "maroon")); // $input is now array("red", "green", // "blue", "black", "maroon") $input = array("red", "green", "blue", "yellow"); array_splice($input, 3, 0, "purple"); // $input is now array("red", "green", // "blue", "purple", "yellow"); ?> Example #2 array_splice(3) examples The following statements change the values of $input the same way: <?php array_push($input, $x, $y); array_splice($input, count($input), 0, array($x, $y)); array_pop($input); array_splice($input, -1); array_shift($input); array_splice($input, 0, 1); array_unshift($input, $x, $y); array_splice($input, 0, 0, array($x, $y)); $input[$x] = $y; // for arrays where key equals offset array_splice($input, $x, 1, $y); ?> SEE ALSO
array_slice(3), unset(3), array_merge(3). PHP Documentation Group ARRAY_SPLICE(3)
All times are GMT -4. The time now is 09:52 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy