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1. UNIX for Beginners Questions & Answers
Hi
I am trying to compile a binary file (CASPER: Context-Aware Scheme for Paired-End Read) but I am getting the following error:
user@user-OptiPlex-780 make
g++ -O2 -Wall -fopenmp -c -o merge.o merge.c
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2. Answers to Frequently Asked Questions
I tried to compile the files in basic_dump_ex using cygwin :
/cygdrive/c/WpdPack/Examples-pcap/basic_dump_ex
$make
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3. UNIX for Dummies Questions & Answers
Hi, I'm trying to compile the code for a program and I run into the following error,
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4. Solaris
Hi guys i came across an error while compiling a c file in solaris using gcc. the error is,
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5. UNIX for Dummies Questions & Answers
Hi I m using redhat 6 with kernel release
2.6.32-71.el6.i686
I have downloaded latest kernel 3.3.1 from kernel.org .
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# make modules_install
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6. Solaris
Hello guys,
Im trying to install a monitoring software on my solaris10 machine and im getting an error doing so. Can someone please help.
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Hi guys.
I have a header file: unp.h like this:
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#define _UNP_H_
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8. UNIX for Advanced & Expert Users
Gentlemen, I can not compile with the Pro-C installed on a Solaris 10. I get the following error ..:
! Compilation: startdmn.pc
------------------------------------------------------------------
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9. Programming
Hi,
I have installed "Freetype2" library in my SuSe Linux 9.3 version system. When Iam compiling a program, I am getting these below errors.
Undefined reference to "FT_Init_FreeType"
Undefined reference to "FT_Load_Char"
Please show me a solution? Thank you.
With regards,
Chandramouli (1 Reply)
Discussion started by: chandra80
1 Replies
10. Programming
Hi All,
I tried to compile a C program but i am getting error while Linking . it says Undefined reference to ' ' (here it gives a method name which is defined Globally ).
Can any body tell the resaon and remedy for the same . Iam stuck up here .
Thanks (3 Replies)
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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)