I have a text file which is not fixed width. I want to put trailing spaces to each line and make it a 100 byte fixed width file.
Can someone please help me as soon as possible?
Thanks,
Denis (1 Reply)
I have a file which contains numbers as follows:
1234 9876 6789 5677 3452
9087 4562 1367 2678 7891
I need to remove the empty spaces and add commas between the numbers like:
1234,9876,6789,5677,3452,
9087,4562,1367,2678,7891
Can anyone tell me the command to do... (4 Replies)
Hi,
I want to print spaces in a trailer record which is a single command.
namely the unix command which i already have
recs=`wc -l $TargetFileDir/myfile.txt|cut -c1-9`;export recs;echo 'PCPC.DXDINPT.FC0.INPUTFLE.PASS'`date +%Y%m%d``printf '%015d\n' $recs` >> $TargetFileDir/myfile1.txt
I... (3 Replies)
Hi,
i have to form the header and add fillers(spaces) to it.
I have done something like this. i have added 10 spaces at the end
HDR="AAAABBBBCCNN "
echo $HDR >> file1.dat
but the spaces are not being stored in the file. How to add the spaces. (2 Replies)
Hi All,
I am trying to get the spaces in the below table to be fill up with a character " - ". For eg, coordinates 0202 is a space but i would want to fill up with " - ". Can anybody help ?
Input:
04 D H ... (15 Replies)
Hi,
I wanted to add specific text to each row in a text file containing three rows. Example:
0 8 7 6 5 5
7 8 9 0 7 9
7 8 9 0 1 2
And I want to add a 21 at the beginning of the first row, and blank spaces at the beginning of the second two rows. To get this:
21 0 8 7 6 5 5
7 8... (4 Replies)
Hi,
I have a problem where I need to append few spaces(say 10 spaces) for each line in a file whose length is say(100 chars) and others leave as it is.
I tried to find the length of each line and then if the length is say 100 chars then tried to write those lines into another file and use a sed... (17 Replies)
I have a file that contains...
elm,mail
elm,lisp,composer,cd,ls,cd,ls,cd,ls,zcat,|,tar,-xvf,ls,cd,ls,cd,ls,vi,ls,cd,ls,vi,elm,-f,ls,rm,ls,cd,ls,vi,vi,ls,vi,ls,cd,ls,elm,cd,ls,cd,ls,vi,vi,vi,ls,vi,ls,i,vi,ls,cp,cd,fg,ls,rm,cd,ls,-l,exit
elm,mail,biff,elm,biff,elm,elm
elm,ls
... (2 Replies)
when I try to read a file and send email using cat and sendmail: The email received having additional spaces.(Between the letters of words in the text)
My code:
export MAILTO="sa@y.com"
export SUBJECT="mydomain PREPROD MONITOR AT ${DATE}"
export... (5 Replies)
Discussion started by: visitsany
5 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)