I have a set of multiple files out of which one i am showing below :
Code:
A0120110124102329 BED.
B01***DETALLADA 43984
The BO1 is the starting pattern of the second line. In the 2nd line in position 30,31,32 i need to replace 111, instead of 3 spaces in the file i need 111. need a query for this.
the output file will look something like this: --
Code:
A0120110124102329 BED.
B01***DETALLADA 43984 111
the 111 in the above file is exactly in the second line at position 30,31,32.
hi, I have an xml file and I need to replace the tags with different names all at a time here is what I have
<cevalue>
<cevalue1>
<cevalue2>
<cevalue3>
<cevalue4>
<cevalue5>
and I need these like these...
<cevalue>
<cevalue>
<cevalue>
<cevalue>
<cevalue>
<cevalue>
I tried a few but... (2 Replies)
I have a series of folders /temp/a /temp/b /temp/c
In folders a, b, and c, I have files
a1.txt..........a20.txt
b1.txt..........b40.txt &
c1.txt..........c60.txt
Each file has the same data format :-
Line 1 AAAAA aaaa
Line 2 BBB bbbbbb
Line 3 CCCC cccccc
Etc etc
I need to write a... (13 Replies)
I'm writing a script which word counts the number of lines in two files. If one file is bigger than the other I'd like to edit one of the files to delete some lines to make both the same. It does not matter where in the file the lines are deleted from. It's expected that this will be ran from... (3 Replies)
I have done a script using sed which replaces a string in file.
I face 2 problems, while using sed command.
1)last line of the file is missing.
2)if i am are using wild card character in the command, Its not taking the next matching pattern ie if I am giving the pattern abc*def to be replaced... (2 Replies)
hi
i had posted this earlier.. got no reply !!
how to change assigned value in a file using sed
suppose the file contains
age = 30;
how to change it to
age =50;
i tried sed 's/^age*./age =50;' filename but i am getting the o/p as
age =50; 30;
plz hlp!! (4 Replies)
I have a sed query.
There is a line which has tilde and I want to separate this line using sed.
The line is:
ABP_ETC_ROOT=~xdmadm
The query to get this line is:
sed -n '/\(.*\)~\(.*\)/p' infile
I want to get xdmadm from this line and I am using this sed command:
sed -n... (5 Replies)
Hello Im fairly familiar with using the sed command for substitution, however I have been passed a script which checks the logged on username and directory type with a sed section which I cant figure out. The sed function has me baffled and I cant find out from the man page what its trying to do... (1 Reply)
Hi all, I am trying to use SED to input lines to a file in a specific place.
So far I have;
sed '/#NewEntry/ i\Insert this line' myfile.txt
The output is printing to screen correctly but what is the best way to write it back to the file without overwriting everything?
I tried adding >... (6 Replies)
Hi all, I am trying to remove quite a lot of numbers for a file I have which looks something along the lines of;
1,2,3,4,5,6 etc
I have a list of numbers I want removing looking like;
10000
10987
16572
etc
etc
and have been trying to run;
for id in `cat list` ; do sed -i -e... (8 Replies)
Hello,
I have a file. its content are like below.
mdn:87439842
imsi:23082038203
Ctime:12082010 01:20:10
mdn:9324783783
imsi:402349823322
Ctime: 12072010 01:20:10
mdn:87439842
imsi:23082038203
Ctime: 23072010 01:20:10
mdn:87439842
imsi:23082038203
Ctime:18072010 01:20:10
mdn:87439842... (3 Replies)
Discussion started by: Sanket11
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)