03-12-2013
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I need the Unix operating system on disc as im new to unix. Im studying unix and x windows next year at Sheffield University and would like to get a head start.
Any suggestions would be appreciated (2 Replies)
Discussion started by: jeffersno1
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2. UNIX for Dummies Questions & Answers
Which is much more powerful as an operating system:
1. Windows 2000
2. Windows 98
3. Windows XP
4. Windows ME
5. Unix
6. Linux
and why is it much more powerful than the other operating systems that i have mentioned.
thanks for your info... (1 Reply)
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3. Filesystems, Disks and Memory
Would any of your gentlemen have come across a decent reference for the FOS in your wanderings? Brocade just seems to want to sell me classes and FAN books :/ (0 Replies)
Discussion started by: Eronysis
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4. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Write a C program that accepts 3 parameters. Each parameter indicates the quantity of product to be
produced.... (0 Replies)
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5. UNIX for Advanced & Expert Users
Hello All,
I want to install Linux on my machine, so please tell me one thing which is the best to install-
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except that if there is any please tell me. (1 Reply)
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6. What is on Your Mind?
Hello all, I'm new here. I wanted as nickname just wizard but it was taken. So Magus.Wizard instead; in my view, a wizard is somebody who really understands computers, a computer wizard, a master, a profi. Not too much about myself, more to the topic - I get tired from all the crap can be found... (2 Replies)
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7. Solaris
Hi,
Iam trying to instal a solaris operating system in a vmware on my local windows system via an iso image named as "solaris10.vmx". but as soon as the vm console opens i get an error message as:
"PXE-MOF: Exiting Intel PXE ROM.
Operating system not found"
Please help me out in... (3 Replies)
Discussion started by: Laxxi
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8. Shell Programming and Scripting
Hi,
I need a script that needs to detect the Operating System and based upon wheter it is Linux, Solaris x86, Sparc, Itanium etc it should populate "ps" command with detailed output accordingly
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ps -xef | grep java -> Itaniumps -auxwww | greap java -> Solaris (9 Replies)
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9. Android
From Wikipedia (FYI): (0 Replies)
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10. UNIX and Linux Applications
Anyone know anything about "Advanced Plus Operating Environment".
Preferably release 10 Revision 522Gcd probably dated 2003. (4 Replies)
Discussion started by: jgt
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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)