I am trying to upload .zip files to Unix server and get the error 553 qmerev2002.zip: Permission denied, what is my problem?? I am able to load other files and folders fine. (3 Replies)
I have more than 500 gzipped files in a directory. I have one lookup file in the same directory with 200 key values. I need to get the name of the gzipped file which have any of these 200 key values. Here my criteria is do not unzip the files due to space constraint. Any suggestion? (3 Replies)
Hi All,
I need to check the logs and grep it. The problem is that the previous days are zipped with *.gz. How do grep on the *.gz?
Thank you in advance. (1 Reply)
Hi,
I have wrote the query on this issue but i hope i have not explained properly. So i am writing again. Sorry for trouble.
file1.txt.arch
... (2 Replies)
Hi everyone,
when I try to copy *.gz files run cp within the correct source folder it works as follow:
Source folder = C:/Documents and Settings/user/Recent papers/2771/
Destination folder = C:/Documents and Settings/user/My documents/1532/temp
cp *.gz "C:/Documents and Settings/user/My... (2 Replies)
I have 2 files of almost same text apart from 2,3 ending lines. Now I want to get that difference in another file.
e.g file1.txt is
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_livecd-lv_root
18G 2.4G 15G 14% /
tmpfs 504M ... (12 Replies)
Hi experts,
I am trying to compare two text files and output the difference to another file.
I'm not strictly looking for differences in text but additional text at the end of one file that isn't in another, so basically comparing the file 2 against file 1 and printing any additional text to... (9 Replies)
Hi,
To all the Unix gurus this should be a simple task, but as a newbie I'm finding it hard to crack this. Any help is highly appreciated...
Scenario:
Step 1 : Move zip file from FTP folder to WORK folder
Step 2:
Unzip the file "Sample_YYYYMMDDHHMMSS.tar.gz" which contains many file... (10 Replies)
Hello dear members,
I have one general and one specific question which I will be very grateful if you could help me with them. Let's start with my general question:
1. I am working on cluster computer shared with other people and I need to manipulate a big zipped text file of 13 GB. There is... (1 Reply)
Hi,
I am zipping more than 20 files that has same timestamp in all of them. I need to create the zip file with the same timestamp as in the files that are zipped.
So I have files:
Dummytest_20140601W110515_file1.txt
Dummytest_20140601W110515_file2.txt
.......
.......... (5 Replies)
Discussion started by: Saanvi1
5 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)