ok i just installed FreeBSD 4.8 on a computer i had lying around and it was working ok but then when i tried to set up KDE's xdm (kdm) i think i must have configured the login manager wrong because i cant login through the kdm and therefore i can log in to BSD at all?!
please can someone help me... (5 Replies)
I am wanting to download the Linux Program. When i go to download it I see several things to download. What do i download exactly? Then what do I do to install it. Also I have partitioned my hard drive to make way for Linux on the other part to play with it, will any problems arise from this?
I... (3 Replies)
I have two Dell x86 machines on which I am attempting to install Solaris 10 from CD. I am not doing a Jumpstart install. This is my first experience in installing Solaris (or any other OS). I am following the instructions at How to Quickly Install the Solaris 10 1/06 OS
The first machine... (3 Replies)
Hello all. I was wondering if there is a way to change the root prompt.
I am using Solaris 10 and would like to have the root prompt display the current directory along with 'SU' to indicate root status.
What I have tried so far:
/etc/passwd
changed the root shell to korn with... (10 Replies)
Hi,
I have a solaris system with only ftp access.Need to get the list of files page wise display..
Also would like to redirect output of "ls" command to a text file in same directory.
Can anyone suggest me the sollution for this?
Rakesh (2 Replies)
For some reason, I have a v240 lying around. I was thinking of connecting it to a 1gbit backbone, but I have no experience with Solaris or Linux whatsoever.
Here's what I would like to do:
- Run a Apache Webserver(XAMPP)
- Run a FTP Server and set the Home directory
Here's some random... (1 Reply)
Solaris machine is at # prompt not able to login in GUI mode :
I want to login solaris server in GUI mode from # prompt.
---------- Post updated 12-30-11 at 11:36 AM ---------- Previous update was 12-29-11 at 02:23 PM ----------
Hi,
Please send me some guidelines regarding this....
as... (2 Replies)
hi
I am new to unix and have found a SPARCstation 5 in the shed. I'm told by my father that it was working when it was put there about 8 years ago.
It seems to boot up and makes all the right noises, both discs appear to make a noise, the keyboard lights flash etc., etc., but i can't seem to get... (2 Replies)
Hi, I need help changing PS1 in Solaris. I tried this:
MYPROMPT="> "
PS1=$LOGNAME@$HOSTNAME:${PWD}$MYPROMPT (NOT SURE WHY IT'S HIGHLIGHTED HERE)
export PS1
My problem is that $PWD is not working, when I get the prompt and I change directories, the prompt is not displaying the current... (17 Replies)
Discussion started by: curiousmal
17 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)