Need help with simple comparison in AWK

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk IF date comparison help

Hey everyone, I'm trying to create a script using awk and if that will list all of our aws tapes that have archived date that is past 90 days from todays current date, so that I can pass that to my aws command to remove. The fifth column is the creation date in epoch/seconds, so I'm...

2. Shell Programming and Scripting

File comparison using awk

Hi All, i have two files file1 ,file 2 file 1 col1|col2|col3|col4|col5|col6|col7|col8 11346925|0|2009-09-20|9999-12-31|100|0 11346925|0|2009-09-20|9999-12-31|120|0 12954311|0|2009-09-11|9999-12-31|100|0 12954311|0|2009-07-23|2999-12-31|120|0 12954312|0|2009-09-11|9999-12-31|100|0...

3. Shell Programming and Scripting

Simple comparison between two lists.

I have two lists (input) Alpha and Beta. Alpha: Beta: Need the output like this: I would like to get an output like this: Alpha vs Beta | -- | a=1 | |z=3 | z=4 | Is it possible ? :cool:

4. Shell Programming and Scripting

AWK string comparison

Hey guys.. New in linux scripting and need some help on some scripting with history command. I managed to export the command history into a file and now i'm trying to select from that file some specific commands that were made in a certain period. Here's what i got so far echo -n...

5. Shell Programming and Scripting

awk comparison and substitution

Hi, here's my - not so easy to describe - problem: I want to compare the values of one file (FileA) with a cutoff-value and, if this comparison is true, substitute those values with those in the second file (FileB). However, there are many FileA's (FileA), whereas there is only one FileB. Every...

6. Shell Programming and Scripting

awk comparison

Hello all, Probably a very simple question, I am stuck with a small part of a code: I am trying to do a comparison to get the maximum value of column 6 if columns 1, 4 and 5 of two or more rows match. Here is what I am doing: awk -F'\t' '{if ($6 > a)a=$6}END{for (i in a) print i"\t"a}' ...

7. Shell Programming and Scripting

Comparison and editing of files using awk.(And also a possible bug in awk for loop?)

I have two files which I would like to compare and then manipulate in a way. File1: pictures.txt 1.1 1.3 dance.txt 1.2 1.4 treehouse.txt 1.3 1.5 File2: pictures.txt 1.5 ref2313 1.4 ref2345 1.3 ref5432 1.2 ref4244 dance.txt 1.6 ref2342 1.5 ref2352 1.4 ref0695 1.3 ref5738 1.2...

8. Shell Programming and Scripting

Simple XML file comparison and merging

Okay, first of all, thanks to everyone who's helped me out before... I appreciate the opportunity to learn. I have two iTunes XML files, and I simply want to compare the contents, then merge. Theoretically, this will allow me to merge two libraries, keeping playlists intact (depending on iTunes'...

9. UNIX for Dummies Questions & Answers

multiple comparison in awk

I have an input file. Each line in it has several characters. If the first three characters of the line is '000' or '001' or '002' or '003', I need to print it in output. How can I do this in awk. I am able to do if the search string is only one (let us say 000). cat <filename> | awk...

10. Shell Programming and Scripting

Comparison of two files in awk

Hi, I have two files file1 and file2 delimited by semicolon, And I want to compare column 2 and column3 of file1 to column3 and column 4 in file2. file1 -------- abc;cef;155.67;143_34; def;fgh;146.55;123.3; frg;hff;134.67;; yyy;fgh;134.78;35_45; file 2 --------- abc;cef;155.09;;...

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)

Shell Programming and Scripting