08-31-2016
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1. UNIX for Advanced & Expert Users
Hi,
I am comparing two numbers, but it gives strange results:
My Code:
if
then
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2. Cybersecurity
hi there , :cool:
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#
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I have created a server monitor program in Java that connects to servers via SSH and constantly refreshes the new server load every 3 mins. The problem is that even though it is a Java app running shell commands to get the load info, the commands still appear in 'history'.
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hi again
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Hi ,
running solaris 10 on t5120 and i see ILOM and ALOM (SC) interfaces working fine earlier and suddenly they are responding strangely,
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Hello All,
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9. Shell Programming and Scripting
Starting sendmail throws this error:
I decided to see the permission on the files under /etc/mail and this is the output:
# ls -ltr
total 284
-rwxr-xr-x. 1 root root 1847 Jan 27 2014 virtusertable
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10. AIX
I just intalled java8_64.jre and .sdk respectively
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Worked like a champ. Now I see this--
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drwxr-xr-x 9 bin bin 512 Sep 22 2010 java14
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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)