It has nothing to do with your version of awk, and a lot to do with spaces in your input file, and the fact that you're still not printing anything in your awk statement.
Hello everybody,
I have a sorted text file. some of the lines appear twice or even more. is there an unix utility that removes the extra appearences?
Thanks,
Ido. (7 Replies)
Hi all,
I'm trying to edit a file using ed on an iphone. I am trying to edit a conf file and have managed to get to the directory where the default.conf file is located, however, when I type ed default.conf all i get is a number and then a blank line and a question mark which is why I am... (1 Reply)
Hi, I need some help in text manipulation.
I have an input file like this:
7629 "WPCW 19 - CW/AM1, WPCB 40 - FAMN/CORNER, WPCB-DT1 50 - FAMN/CORNER, "
W35AW - Various Shopping Pgms
W41CF - TBN
W47CV - TBN
WLLS-LP 49 - AM1
WATCH WPXI 11 N & WPIX 11 CW
1234 "WPCW 19 - CW/AM1,... (26 Replies)
I wrote this script to create and edit a large number of websites based on a template site and a collection of text files which have the relevant strings in them delimited by colons. I run it and the shell doesn't produce any errors, but when it gets to the for loop where it actually has to edit... (2 Replies)
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... (1 Reply)
Dear all,
I'm starting to learn programming, and I'm having some problem with awk text editing.
I'm having a huge text file, and my goal is to print "something" before every 4th row starting from the second row.
File example:
AAAAA
BBBBBB
CCCCC
DDDDD
AAAAAAA
BBBBBBBB
CCCCCCC... (2 Replies)
Hi,
I have text file with the header like this
tracking_id condition replicate FPKM
XLOC_000001 alpha 1 10.3199
XLOC_000001 alpha 0 10.3686
XLOC_000001 alpha 2 15.5619
...
With the first column being genes, the second being the condition, the third... (5 Replies)
Dear Guru's
I'm using Putty and want to edit a file. I know we generally use vi editor to do it. As I'm not good in using vi editor, I want to convert the vi into something like text pad. Is there any option in Putty to do the same ? Thanks for your response.
Srini (6 Replies)
Good morning all, I have a machine running IRIX and I need to edit a text file on the terminal that is literally thousands of lines. Does anyone know the most efficient way to edit portions of files like these? Obviously simply using the vi command isn't going to work since I get a too many lines... (1 Reply)
Hello all.
I need to rearrange a very long text file with the following format.
The number of lines in each block is variable, but is between 1 and 10.
Any hints what command could I use for this?
Thank you.
SAMPLE 2600
15 3453 159 3970 486 4327 760 4498
... (3 Replies)
Discussion started by: yirgacheffe
3 Replies
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)