hi
could any body tell me how to extract .tar.bz2 files
i tried using tar but in vain.
i found bzip2 in googling but i could not find it on machine unix tru64
please suggest. (1 Reply)
Hello,
I am using a bash script to archive directories of text files located in ${root}:
tar cf ${root}.tar ${root}*
bzip2 ${root}.tar
I'd like to compare the newly produced archive two.tar.bz2 with the second latest one.tar.bz2.
cmp one.tar.bz2 two.tar.bz2
returns
one.tar.bz2 two.tar.bz2... (2 Replies)
Hi,
I am trying to unpack and install .tar.bz2 library.
I was told to cd /
and than tar -jxvf /source-of-library-file?...tar.bz2
to get files unpacked and installed into /
Darius
$ pwd
/
$
$ tar -jxvf /tmp/local/root/ncurses-dev-addon.tar.bz2
ncurses-dev-addon/... (3 Replies)
Hi experts,
I have two tar.bz2 file,:
a.tar.bz2 and b.tar.bz2
I want to put a.tar.bz2 in to b.tar.bz2
eg: b.tar.bz2 only have one file named "b.c" contained
I want it contain "b.c and a.tar.bz2"
I don't want to decompress the b.tar.bz2 to achieve this, I try with "cat a.tar.bz2 >>... (1 Reply)
Does anyone know a reliable source to download firefox-19.0.2.tar.bz2 from? I would think you be able to download from firefox or mozilla somewhere. I haven't gotten anything useful from my google searches. (2 Replies)
while extracting a tar.bz2 file using the command
tar xjf git.tar.bz2
I received error messages that shows Cannot hard link to and Cannot create symlink to error messages
what will be the reason for those error messages. (4 Replies)
I am using the below aria2c command to call an API that downloads a file to a directory. Though the process completes and I get "download complete"... aria2c does not exit to the command line, I have to hit enter to get the command line. I am not sure what is wrong. Am I missing something in... (0 Replies)
In the bash below each .tar.bz2 (usually 2) are extracted and then the original .tar.bz2 is removed. However, only one (presumably the first extracted) is being removed, however both are extracted. I am not sure why this is? Thank you :).
tar.bz2 folders in /home/cmccabe/Desktop/NGS/API
... (3 Replies)
The below bash will untar each tar.bz2 folder in the directory, then remove the tar.bz2.
Each of the tar.bz2 folders ranges from 40-75GB and currently takes ~2 hours to extract. Is there a way to speed up the extraction process?
I am using a xeon processor with 12 cores. Thank you :).
... (7 Replies)
Discussion started by: cmccabe
7 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)