Awk:Comparing and matching two file Post: 302737625

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Comparing 2 csv files and matching content

Hello, I have the following problem: There are two csv files csv-file #1: aaa1, aaa2, ... aaan aaa1, bbb2, ... bbbn aaa1, ccc2, ... cccn bbb1, bbb2, ... bbbn ... zzz1, zzz2, ... zzzn csv-file #2: aaa1, matchvalue1 ccc1, matchvalue2

2. Shell Programming and Scripting

Comparing 2 files with awk and updating 2nd file

file1: (unique files) 1 /pub/atomicbk/catalog/catalog.gif 693 2 /pub/atomicbk/catalog/home.gif 813 3 /pub/atomicbk/catalog/logo2.gif 12871 4 /pub/atomicbk/catalog/sleazbk.html 18338 file2: (duplicate filenames allowed) 28/Aug/1995:00:00:38 1 /pub/atomicbk/catalog/home.gif 813...

3. Shell Programming and Scripting

AWK - Comparing/Matching/Counting with 2 files

I have 2 files that I want to do some comparing on. First, I want to find the unique list of devices in file1 and then put them to a new file, file2. I was able to do this without any problem with the following statement: cat file1 | awk '{print $2}' | awk '!x++' > file2Here is what I can't...

4. Shell Programming and Scripting

AWK file comparing and composing

Hi all, I'm less than newbie with AWK, but I'd like to learn more with your help! This is my problem. I've two files. File A test_a component_b test_b component_k test_c component_d test_g component_b test_k component_a .... The first column is a key (there is ONE test_a...

5. Shell Programming and Scripting

comparing two files for matching fields

I am newbie to unix and would please like some help to solve the task below I have two files, file_a.text and file_b.text that I want to evaluate. file_a.text 1698.74 1711.88 6576.25 899.41 3205.63 4187.98 697.35 1551.83 ...

6. Shell Programming and Scripting

Comparing two csv file fields using awk script

Hi All, I want to remove the rows from File1.csv by comparing the columns/fields in the File2.csv. I only need the records whose first column is same and the second column is different for the same record in both files.Here is an example on what I need. File1.csv: RAJAK|ACTIVE|1...

7. Shell Programming and Scripting

awk - writing matching pattern to a new file and deleting it from the current file

Hello , I have comma delimited file with over 20 fileds that i need to do some validations on. I have to check if certain fields are null and then write the line containing the null field into a new file and then delete the line from the current file. Can someone tell me how i could go...

8. Shell Programming and Scripting

awk to update file with sum of matching fields in another file

In the awk below I am trying to add a penalty to a score to each matching $1 in file2 based on the sum of $3+$4 (variable TL) from file1. Then the $4 value in file1 is divided by TL and multiplied by 100 (this valvue is variable S). Finally, $2 in file2 - S gives the updated $2 result in file2....

9. Shell Programming and Scripting

Comparing two files by two matching fields

Long time listener first time poster. Hope someone can advise. I have two files, 1000+ lines in each, two fields in each file. After performing a sort, what is the best way to find exact matches where field $1 and $2 in file1 are also present in file2 on the same line, then output only those...

10. UNIX for Beginners Questions & Answers

awk to update file with partial matching line in another file and append text

In the awk below I am trying to cp and paste each matching line in f2 to $3 in f1 if $2 of f1 is in the line in f2 somewhere. There will always be a match (usually more then 1) and my actual data is much larger (several hundreds of lines) in both f1 and f2. When the line in f2 is pasted to $3 in...

LEARN ABOUT DEBIAN

bup-margin

bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME

       bup-margin - figure out your deduplication safety margin

SYNOPSIS

       bup margin [options...]

DESCRIPTION

       bup margin  iterates  through  all  objects  in	your  bup repository, calculating the largest number of prefix bits shared between any two
       entries.  This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.

       For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45.  That  means  a  46-bit
       hash  would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
       its first 46 bits.

       The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects.  Since SHA-1 hashes have 160 bits,
       that  leaves 115 bits of margin.  Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
       with far fewer objects.

       If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see	if
       you're getting dangerously close to 160 bits.

OPTIONS

       --predict
	      Guess  the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
	      from the guess.  This is potentially useful for tuning an interpolation search algorithm.

       --ignore-midx
	      don't use .midx files, use only .idx files.  This is only really useful when used with --predict.

EXAMPLE

	      $ bup margin
	      Reading indexes: 100.00% (1612581/1612581), done.
	      40
	      40 matching prefix bits
	      1.94 bits per doubling
	      120 bits (61.86 doublings) remaining
	      4.19338e+18 times larger is possible

	      Everyone on earth could have 625878182 data sets
	      like yours, all in one repository, and we would
	      expect 1 object collision.

	      $ bup margin --predict
	      PackIdxList: using 1 index.
	      Reading indexes: 100.00% (1612581/1612581), done.
	      915 of 1612581 (0.057%)

SEE ALSO

       bup-midx(1), bup-save(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															     bup-margin(1)