03-30-2011
Thanks Chubler ... as always ... ur solution works !!
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
1 . Thanks everyone who read the post first.
2 . I have a log file which size is 143M , I can not use vi open it .I can not use xedit open it too.
How to view it ?
If I want to view 200-300 ,how can I implement it
3 . Thanks (3 Replies)
Discussion started by: chenhao_no1
3 Replies
2. Shell Programming and Scripting
I need an assistance in file generation using awk, sed or anything...
I have a big file that i need to filter desired parts only. The objective is to select (and print) the report # having the string "apple" on 2 consecutive lines in every report. Please note that the "apple" line has a HEX... (1 Reply)
Discussion started by: apalex
1 Replies
3. Shell Programming and Scripting
Morning guys. Another day another question. :rolleyes:
I am knocking up a script to pull some data from a file. The problem is the file is very big (up to 1 gig in size), so this solution:
for results in `grep "^\
... works, but takes ages (we're talking minutes) to run. The data is held... (8 Replies)
Discussion started by: dlam
8 Replies
4. Shell Programming and Scripting
hi guys,
i want to parse a file using public function, the file contain raw data in the below format i want to get the output like this to load it to Oracle DB
MARWA1,BSS:26,1,3,0,0,0,0,0.00,22,22,22.00
MARWA2,BSS:26,1,3,0,0,0,0,0.00,22,22,22.00
this the file raw format:
Number of... (6 Replies)
Discussion started by: dagigg
6 Replies
5. Shell Programming and Scripting
I have an xml file with the structure:
<tag1>
<value1>xyx</value1>
<value2>123</value2>
</tag1>
<tag1>
<value1>568</value1>
<value2>zzzzz</value2>
</tag1>
where I want to parse each data pair in the this single file, so something like:
find first tag1 data pair... (1 Reply)
Discussion started by: unclecameron
1 Replies
6. Shell Programming and Scripting
Hi all,
I would like to compare a column in one file to a column in another file and when there is a match it prints the first column and the corresponding second column. Example
File1
ABA
ABC
ABE
ABF
File 2
ABA 123
ABB 124
ABD 125
ABC 126
So what I would like printed to a... (6 Replies)
Discussion started by: pcg
6 Replies
7. Shell Programming and Scripting
Hi guys (and gals).
I need some help. I'm running an IVR purely on Asterisk where I capture the DTMFs. After pulsing each DTMF I have Asterisk write to a file with whatever was dialed (mostly used for record-keeping) and at the end of the survey I write all variables in a single line to a... (2 Replies)
Discussion started by: tulf210
2 Replies
8. Shell Programming and Scripting
Hi Experts,
I am trying to parse the following file;
FILEA
a|b|c|c|c|c
a|b|d|d|d|d
e|f|a|a|a|a
e|f|b|b|b|boutput expected:
a<TAB>b
<TAB><TAB>c<TAB>c<TAB>c<TAB>c<TAB>
<TAB><TAB>d<TAB>d<TAB>d<TAB>d<TAB>
e<TAB>f
<TAB><TAB>a<TAB>a<TAB>a<TAB>a<TAB>
<TAB><TAB>b<TAB>b<TAB>b<TAB>b<TAB>*... (7 Replies)
Discussion started by: rajangupta2387
7 Replies
9. Shell Programming and Scripting
Hi all, I have a file that contains a good hundred of these job definitions below:
Job Name Last Start Last End ST Run Pri/Xit
________________________________________________________________ ____________________... (7 Replies)
Discussion started by: atticuss
7 Replies
10. Shell Programming and Scripting
this thread is a continuation from previous thread
https://www.unix.com/shell-programming-and-scripting/223901-split-big-file-into-multiple-files-based-first-four-characters.html
..I am using awk to split file and I have a syntax error while executing the below code
I am using AIX 7.2... (4 Replies)
Discussion started by: etldev
4 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)