Dear All,
Yesterday I'm change /etc/vfstab file ( disable 1 Device mounting)
and now I can't login to multiuser mode just single user mode, and now I want enable again, but I can't using vi editor in single user mode
How to edit this file? thereis default can't using vi editor in single mode?... (14 Replies)
Hello everyone. I have been reading a lot about the various different text editors at my disposal through Unix, but I just can't seem to close the deal for what I am trying to do. Is there a way to issue a single line command to edit a file where pattern=x, and do it non-destructively AND in-place?... (1 Reply)
I've got a configuration file that is filled with xml text statements for example:
<...../>
<...../>
<...../>
<data id="java-options" value="-server -Djava.security.policy..../>
<...../>
<...../>
<...../>
I want to write a korn shell script that will go to this specific line and add a... (2 Replies)
I need a script to process a huge single line text file:
The sample of the text is:
"forward_inline_item": "Inline", "options_region_Australia": "Australia", "server_event_err_msg": "There was an error attempting to save", "Token": "Yes", "family": "Family","pwd_login_tab": "Enter Your... (1 Reply)
Hi,
Can anyone know how to use perl to merge the following multi-line information which beginning with "BAM" into one line. For each line need to delete the return and add a space. Please see the red color line.
******Org. Multi-line)
BAM admin 101.203.57.22 ... (3 Replies)
Hello,
Did anyone know how to write a perl script to merge the multi-line into a single line where each line with start at timestamp
Input-->
timestamp=2009-11-10-04.55.20.829347;
a;
b;
c;
timestamp=2009-11-10-04.55.20.829347;
aa;
bb;
cc; (5 Replies)
Hi All
I need a small help for the below format in making a small script in Perl or Shell.
I have a file in which a single line entries are broken into three line entries.
Eg:
I have a
pen and
notebook.
All i want is to capture in a single line in a separate file.
eg: I have a pen and... (4 Replies)
Hey guy's....
I new here,
But im working on a school project, and I am not really good at programming. In fact, this is the only programming class that I need because programming is not what I am majoring in.
But I have everything done in this shell script except for this last part.....
... (9 Replies)
Hello
I want to replace the path to which a hyperlink points to. I have a html file
<TABLE BORDER CELLPADDING=7, border=0><TR><td>Jun-10-2013_03_19_07_AM</td><td>Ank_Insert_1</td><td><b>FAILED: 1</b></td><td><A
... (14 Replies)
Hi Experts,
I am querying backup status results for multiple databases and getting each and every database result in one csv file. so i need to combine all csv files in one excel file with separate tabs. I am not familiar with perl script so i am using shell script.
Could anyone please... (4 Replies)
Discussion started by: ramakrk2
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)