I need to remove permanently some 3 GB of temp folder which contains Log file, simulation files from my disk.
if i use "rm - rf <filename>" command it asks about conformation for accessing each folder and for removing every file and giving yes to every message in terminal window is very... (2 Replies)
I have a file which consists of 1000 entries. Out of 1000 entries i have 500 Duplicate Entires. I want to remove the first Duplicate Entry (i,e entire Line) in the File.
The example of the File is shown below:
8244100010143276|MARISOL CARO||MORALES|HSD768|CARR 430 KM 1.7 ... (1 Reply)
Hi,
I'm a newbie to shell scripting and I have the following problem:
I need all spaces between two letters or a letter and a number exchanged for an underscore, but all spaces between a letter and other characters need to remain. Searching forums didn't help...
One example for clarity:
... (3 Replies)
All,
I know that this will remove a file extension from a file name, but reading on the documentation on how it works confuses me.
${filename%.*}Can anyone explain what exactly is going on here? Filename is the pattern and % says to cut anything that starts with .?
Also, can I run this... (4 Replies)
Hello..
I have a text file. I want to remove all the blank spaces(except tab) from the file..
I tried using sed command as shown below
sed 's/ //g' file1
But the problem with the above command is that it also eliminates 'tab' which is between the columns..
For example if the contents... (7 Replies)
I have a file from which I want to eliminate the numerical values..
The contents of the file are as shown below..
1 a1,b,2 1,b,c
2 a2,4,b a,b,2
From the above file I want eliminate only the numberical values(except the line numbers which are at the beginning)..
The file... (12 Replies)
Hi All,
I don't want any codes for this problem. Just suggestions:
I have a huge collection of text files (around 300,000) which look like this:
1.fil
orange
apple
dskjdsk
computer
skjks
The entire text collection (referenced above) has about 1 billion words.
I have created... (1 Reply)
Hi Everyone,
I see some peculier thing happening on my server. I have one zipped file created long back as a normal user and trying to remove it now. When i tried to remove as that particular user, i was not able to do that. So i logged in as a root user and removed that successfully. But it... (8 Replies)
Hi,
I am trying to remove a string ".var" using the below command but it's not working as expected, when I execute this in the command prompt using the echo it's working fine , please let me know where I am doing it wrong.
UYRD=$FILE_$timestamp.csv | awk '{gsub(".var", "");print}' # this is... (6 Replies)
What I need is to remove the text from Location_file.txt from each line matching all entries from Remove_location.txt
Location_file.txt
FlowPrePaid, h3nmg1cm2,Jamaica_MTAImageFileFlowPrePaid,h0nmg1cm1, Flow_BeatTest,FlowRockTest
FlowNewTest,FlowNewTest,h0nmg1cm1
PartiallySubscribed,... (3 Replies)
Discussion started by: ketanraut
3 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)