01-04-2013
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Recentily i receive virus ninda and my network was files *.eml.
I find all *.eml with:
find / -name *.eml -print > virus
Virus has the path and name of the file,so, How can i delete all *.eml?
Thanks (2 Replies)
Discussion started by: AlvaroD
2 Replies
2. Shell Programming and Scripting
HI,
I have a folder with some 120 files...i just want to print all the file filenames(not the content or anything else) onto a file say .txt.
please help me with this command
Thanks a lot. (15 Replies)
Discussion started by: kumarsaravana_s
15 Replies
3. UNIX for Dummies Questions & Answers
i have a txt file of image names that have to be deleted in pwd how can i use the txt file to delete the files in pwd and is it possible?--i might be able to import the txt files into a spreadsheet ahd same it as a csv file. i want it to be done recursive lly --what i mean is teh sysem goes thru... (4 Replies)
Discussion started by: plener
4 Replies
4. Shell Programming and Scripting
Hi all.
I have a directory which contains files that can be versioned. All the files are named according to a pattern like this:
TEXTSTRING1-001.EXTENSION
TEXTSTRING2-001.EXTENSION
TEXTSTRING3-001.EXTENSION
...
TEXTSTRINGn-001.EXTENSION
If a file is versioned, a file called
... (10 Replies)
Discussion started by: fox1212
10 Replies
5. Shell Programming and Scripting
I am trying to write a script that will copy all file listed in a text file (100s of file names) to a new directory
Assume script will run with main as current working directory and I know how many files/lines will be in List.txt
Im trying to work up a test script using this model
Contents of... (2 Replies)
Discussion started by: IAmTheGrass
2 Replies
6. Shell Programming and Scripting
Data files coming in different names in a file name called process.txt.
1. shipments_yyyymmdd.gz
2 Order_yyyymmdd.gz
3. Invoice_yyyymmdd.gz
4. globalorder_yyyymmdd.gz
The process needs to discard all the below files and only process two of the 4 file names available
... (1 Reply)
Discussion started by: dsravanam
1 Replies
7. Shell Programming and Scripting
Hi Team,
Here's the scenario,
I have a text file called "file_list.txt". Its content is as follows.
111.tmp
112.tmp
113.tmp
114.tmp
These files will present in "workdir" directory. It has many files. But only the files present in file_list.txt has to be deleted from the workdir... (7 Replies)
Discussion started by: kmanivan82
7 Replies
8. Shell Programming and Scripting
Hello Everyone,
I want to delete the image files from a directory, which are not listed in a TEXT file.
The directory contains large number of image files (in millions) required / not required. I want to delete the image files which are "not required".
I have generated a Text file having... (3 Replies)
Discussion started by: Praveen Pandit
3 Replies
9. UNIX for Dummies Questions & Answers
Hi, I have very old files in my server like from 2012 and i want to delete them,
Please help.
Thanks in advance.. (2 Replies)
Discussion started by: nanz143
2 Replies
10. Shell Programming and Scripting
Hi,
I need some help in the below scenario.
I need to delete all the files from the directory except the file name available in the Except file.
Like the folder ABC have files like A1.txt,A2.txt......A10.txt
and also have a file named Except.txt with the content A3.txt,A4.txt
Need a... (6 Replies)
Discussion started by: kban
6 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)