Aloha! I have just over 1k of users that have permissions that they shouldn't under our system. I need to parse a provided list of usernames, check their permissions file, and strip the permissions that they are not allowed to have. If upon the permissions strip they are left with no permissions,... (6 Replies)
I have a file with varying record length in it. I need to reformat this file so that each line will have a length of 100 characters (99 characters + the line feed).
AU * A01 EXPENSE 6990370000 CWF SUBC TRAVEL & MISC
MY * A02 RESALE 6990788000 Y... (3 Replies)
How can i add new parameters into a line, and redirect the line to other file?
For example:
1.sh
name:owner
google:richard
youtube:student
I want a, for example 2.sh with:
name:owner:description
google:richard:search site
youtube:student:video site
In the 2.sh, I added a new column:... (7 Replies)
Hi
Trying to do like this :
echo "$variable1\n $(cat file.txt)"
but it only adds one time. When I run this cmd again with different variable it only replaces line of variable1.
How to add constantly line into first line in file ? (3 Replies)
I have a set of log files that are in the following format
======= set_1 ========
counter : 315
counter2: 204597
counter3: 290582
======= set_2 ========
counter : 315
counter2: 204597
counter3: 290582
======= set_3 ========
counter : 315
counter2: 204597
counter3: 290582
Is... (6 Replies)
I cannot seem to get this to work..
I have a file which has about 100 lines, and there is no end of line (line break \n) at the end of each line, and this is causing problem when i paste them into an application.
the file looks like this
this is a test
that is a test
balblblablblhblbha... (1 Reply)
Hello guys,
I'm making a script to add visudo with this script.
Do you guys know if it's possible to add words to a line-number you want to.
Something like this:
echo "Adding words to line-number 16" >> /etc/sudoers # (options to add to line-number-16)?
Thanks! (3 Replies)
Hi,
I am trying to compare 2 lists. However, one of these lists has to be taken from a.pdf file. When I copy the test into a .txt document there are formatting errors which I need to correct. The document is long (~10,000 lines) so I need to script the re-formatting.
Currently my file looks... (9 Replies)
Hi All,
I am new to Unix and I have one challenge and below are the details.
I have pipe delimited text file in that data has span into multiple lines instead of single line.
Sample data.
Data should be like below for entire file.
41|216|398555|77|provided complete NP outcome data ... (21 Replies)
Hello,
I'm trying to figure out how to speed up the following as I want to use multiple commands to search thousands of files.
is there a way to speed things up?
Example I want to search a bunch of files for a specific line, if this line already exists do nothing, if it doesn't exist add it... (4 Replies)
Discussion started by: f77hack
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)