12-02-2013
Moderator's Comments:
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I am moving this to the AIX forum where you'll find more qualified help.
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10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi,
under SUN Unix, in which file the expiry date of a user password is indicated ?
Many thanks. (2 Replies)
Discussion started by: big123456
2 Replies
2. UNIX for Advanced & Expert Users
I want to know the command through which we can know the expiry date
of the password.
I tried chage but it is not working on my system please provide
necessary information
I am not using root
I need info on user level (2 Replies)
Discussion started by: irshad
2 Replies
3. AIX
Hi All,
Could anyone please help me with the command or script for checking the password expiry for a particular userid on AIX.
Regards,
Sanjay...:) (5 Replies)
Discussion started by: SanjayPasum
5 Replies
4. Solaris
Hi,
Is there any way of sending an email to a number of users indicating that the passwords of user accounts will expire?
Currently we have a test server with a number of oracle test accounts on it. Each of these accounts correspond to an instance of Oracle on the server. These... (2 Replies)
Discussion started by: sparcman
2 Replies
5. Solaris
Hi Gurus
I have a few Sol 5.9 servers and i have enabled password less authentication between them for my user ID. Often i have found that when my password has expired,the login fails.
Resetting my password reenables the keys.
Do i need to do something to avoid this scenario or is this... (2 Replies)
Discussion started by: Renjesh
2 Replies
6. Shell Programming and Scripting
Hi,
Could someone please let me know how to write script for passwd expiry notification on salaries boxes.
Regards
Dnyan (1 Reply)
Discussion started by: dnyan
1 Replies
7. Shell Programming and Scripting
Hi All,
Can anybody help me, to find the command to check for the password expiry date for the hp servers.
Thanks,
Deepak (3 Replies)
Discussion started by: dswain
3 Replies
8. UNIX for Advanced & Expert Users
SunOS 5.10 Generic_142900-15 sun4v sparc SUNW,T5240
how can i check the storage type being used in unix solaris sparc system?
please help me its urgnet..
thank you (1 Reply)
Discussion started by: aesgs
1 Replies
9. Solaris
SunOS 5.10 Generic_142900-15 sun4v sparc SUNW,T5240
how can i check the storage type being used in unix solaris sparc system?
please help me its urgnet..
thank you (22 Replies)
Discussion started by: aesgs
22 Replies
10. Filesystems, Disks and Memory
how can i check the storage type being used in unix solaris sparc system?
please help me its urgnet..
thank you (4 Replies)
Discussion started by: aesgs
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)