typeset -i A=16#0
typeset -u A=$a
y=${A#16#}
This converted $a to hex and stored it in y.
Can someone walk me through how this was done?
thanks (2 Replies)
Hi,
If i have an input as
c1:41 c2:0x0000.00046b3e
I want to make output display as
c1:41 c2:224062
.
Basically convert first part 0x0000 (as hex) to decimal which is 0 and
convert second part 0x00046b3e (as hex) to decimal which is 289598
and as such add both parts namely... (3 Replies)
Hi,
please tell me how to convert hex number to decimal
000000E7
000000000002640D
0000000000025B16
and seconds to minutes, hours, days, months, years
bytes to kbytes, mbytes , gbytes
read the following examples
while read a b
do
printf "%5d %5d\n" "0x$a" "0x$b"
done < "$FILE"... (15 Replies)
Hi,
I am a bit stuck with displaying characters. I am having values like below in the proper displayable characters. which I would want to print the actual value on the right hand side. I dont want to create an array because I would have to create 255 different values. isnt there another way of... (17 Replies)
Hi
I would like to test for a max number value. It may be a decimal so I know I have to pipe into bc.
I just cannot get the syntax for this to work. I cannot get passed an error with the bracket - see below.
Any help appreciated.
Regards
Ewan
This works:
/export/home/ewan> cat... (5 Replies)
Hi all
we have a file ONE like this
12345 98765
67222 74252
76991 90091
and we have one more file TWO like
huiiii 67jjjj u988 99999 uj99j 98765
hujg 7yhh ij999 78688 ijo99 74252
Now i want create THREE file which
is like
huiiii 67jjjj u988 12345 uj99j 98765
hujg 7yhh ij999... (2 Replies)
Hi All,
newbie here, i'm just wondering how can i swap the two values of variables without using the third variable.
Please advise,
Thanks, (5 Replies)
Assume I have a file \usr\home\\somedir\myfile123.txt
and I want to replace all occurencies of the two (concatenated) hex values x'AD' x'A0' bytwo other (concatenated) hex values x'20' x'6E'
How can I achieve this with the gnu sed tool?
Additional question: Is there a way to let sed show... (1 Reply)
This is very basic. Yet Iam struggling to get the right pattern for my check.
Apologize in advance to ask a very lame question.
I have to validate if a value of the variable starts with "efgh" and followed by 6 numbers.
Var1="efgh234567"
The condition Iam trying to achieve is similar to... (6 Replies)
Discussion started by: deepakwins
6 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)