Hi Everyone,
There is a perl file: a.pl
============
#!/usr/bin/perl
my $config_file = $ARGV;
open CONFIG, "$config_file" or die "Program stopping, couldn't open the configuration file '$config_file'.\n";
my $config = join "", <CONFIG>;
close CONFIG;
eval $config;
die "Couldn't... (1 Reply)
Hi,
This is the first time playing around with perl and need some help.
Assuming if i have a line of text that looks like this:
Date/Time=Nov 18 17:12:11;Device Name=192.168.1.1;Device IP=192.168.1.1;Device Class=IDS;Source IP=155.212.212.111;Source Name=UNKNOWN;Source Port=1679... (3 Replies)
Very new to perl and have an exististing script which I need to capture some variables to a log file. My below code works well, except the @cmds array has some %20 which I need replaced with a space and some <br> which needs a \n instead. I tried messing around with a foreach, but have failed.
... (6 Replies)
i am very new to Perl. i am using Ubuntu. i have a string call $string that contains following words "new line". i also have a data file as follows.
djfibjbet
etitrbjijbtr rrge rgjierjegjeri
jerijg
kijij jijij
i want to write my new line to my data file as follows.
djfibjbet... (3 Replies)
hi, i am a really new to Perl. i have a following code that is working well.
"
i know this is really simple, but i cant figure out a way to do this. can someone help me please?:( (1 Reply)
I have 1 file that has elements as follows. Also the CVR(10) and the word "SAUCE" only appear once in the file so maybe a grep command would work?
file1
CVR( 9) = 0.385E+05, ! VEHICLE
CVR(10) = 0.246E+05, ! SAUCE
CVR(11) = 0.162E+03, ! VEHICLE
I need to extract the... (6 Replies)
Hi,
I am trying to do a write operation followed by a read operation on the same file through Perl, expecting the output produced by read to contain the new lines added, as follows:
#! /usr/bin/perl -w
open FH, "+< testfile" or die "$@";
print FH "New content added\n";
while (my $line =... (1 Reply)
I have file which contains a huge amount of data. I need to search the pattern Message id. When that pattern is matched I need to get abcdeff0-1g6g-91g3-1z2z-2mm605m90000 to another file.
Kindly provide your input.
File is like below
Jan 11 04:05:10 linux100 |NOTICE... (2 Replies)
Hi
I am trying to build a web form where it can take the input from the user and write it to a file. And when I will open that form again that for should read the file that was created at the 1st step and all the fields should auto populate from that file. I have 20 text fields in my form. I... (1 Reply)
Discussion started by: sauravrout
1 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)