I am really new to Unix. I have just bought an old HP 715/100 running HP-UX. When it first arrived to me I did not assign a password to the administrator account. When it comes to the login screen I am not able to log into the graphical interface. I have tried using administrator and also root as I... (0 Replies)
Hello Guys.
This might be really easy for you guys but i'm really going crazy about this problem.
I have this user that is trying to login to my unix box and it will not let him pass the point where it says TERM = (ansi ) and the last line that shows is teminal is ansi. It wont go any further.... (7 Replies)
Hello!
I'm going through security checklist for AIX 5.3 and i just can't disable remote login for root through ssh.
What i did:
- in /etc/security/user i added a line:
rlogin = false
which works fine when i try to login through telnet
- after installation of openSSH i edited... (3 Replies)
Hi ,
I am trying for squirrelmail In Rhel 5 I have the Image of the DVD .But in that I can't Find the
squirrelmail-1.4.2-1.noarch.rpm
And i downloaded the same but it is not working .
can anyone can give any link to download the same for Rhel5.??
Thanks (1 Reply)
Hi all,
please help me out
i want to configure squirrelmail in RHEL 5 ( i have configured sendmail on the same server)
plz tell me the ways to confiigure it,Pre-requisite
1) via rpm
2) via package
i am pretty confused by the document on the internet which to apply.plz help me out . (1 Reply)
Hi All,
I have setup a non root user on AIX 5.3, using smit. When I try logging on as that user my login screen just disappears. I am using PUTTY. I login to the same box as root no problems. I have tried re-creating several different usernames but get the same effect I have also telneted from a... (2 Replies)
I have disabled rlogin for root successfully , but after that i could not login to root from console and could not su to root from other users as it responded as expired account
I did not have any admin user but I have managed to recover the situation by accessing rootvg before mounting it, but... (5 Replies)
Hi Experts,
I am using ubuntu.When i am trying to login it is showing grub ..How i can overcome to this problem..Pls reply me ASAP..
Thanks,
Sree (1 Reply)
Hi,
As part of the security hardening activity in our team, we have to disable CBC mode cipher encryption, and enable CTR or GCM cipher mode encryption.
To do this, in sshd_config I comment out these lines :
Ciphers aes128-cbc,blowfish-cbc,3des-cbc
MACS hmac-sha1,hmac-md5
and add... (9 Replies)
Discussion started by: anaigini45
9 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)