Hi
i need a script which reads a certain file and then display it on the screen.
The thing is i need to filter the display output.
this is an example of the file which is to be loaded in the script.
asdfg1.1.1|98
hjkldfe4.0.3|123
asdzxzvdweradfsdafascv10.0.10|123456789... (1 Reply)
Hello to all Gurus out there,
Could you show me a source code in Unix platform using C language. I want to read the status or voltage level of the DSR and CTS.
Thanks a lot,
Swing5 (2 Replies)
hi all,
I have this file with some user data.
example:
$cat myfile.txt
FName|LName|Gender|Company|Branch|Bday|Salary|Age
aaaa|bbbb|male|cccc|dddd|19900814|15000|20|
eeee|asdg|male|gggg|ksgu|19911216|||
aara|bdbm|male|kkkk|acke|19931018||23|
asad|kfjg|male|kkkc|gkgg|19921213|14000|24|... (4 Replies)
Gurus,
I am looking for a book on Awk programming.
A quick Google search gave me Amazon.com: The AWK Programming Language (9780201079814): Alfred V. Aho, Brian W. Kernighan, Peter J. Weinberger: Books by Alfred Aho.
Is there anything other than that? Any advice?
Thanks.
Al. (1 Reply)
Is there any way to create an SMTP mail server will all granular permissions to it so that I can read emails which that server receives through any scripting language and also reply from the same server automatically? (3 Replies)
Guys,
May i know how can we de reference the code reference variable.?
my $a = sub{$a=shift;$b=shift;print "SUM:",($a+$b),"\n";};
print $a->(4,5);
How can we print the whole function ?
Please suggest me regarding this.
Thanks for your time :)
Cheers,
Ranga :) (0 Replies)
Hi Folks,
I have a text file with lots of rows with duplicates in the first column, i want to filter out records based on filter columns in a different filter text file.
bash scripting is what i need.
Data.txt
Name OrderID Quantity
Sam 123 300
Jay 342 498
Kev 78 2500
Sam 420 50
Vic 10... (3 Replies)
Hi,
I'd be grateful for your help with the following:
I have a file with a single column (file1). Let's say the values are:
a
b
c
5
d
I have a second, reference file (ref_file), which is colon-delimited, and is effectively a key. Let's say the values in it are:
a:1
b:2
c:3
d:4... (4 Replies)
Discussion started by: aberg
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)