01-26-2015
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Seems I'm inundating this forum with questions, but anyway:
I am writing a script that should accept one and only one argument when called.
That argument should designate a file, either with path/filename or just filename.
Now to the difficult bit:
I want to figure out a way to store... (9 Replies)
Discussion started by: ropers
9 Replies
2. Shell Programming and Scripting
given a relative path, how do i convert it into a full one. i.e. if i am in
/home/polypus
and i am given foo/bar then to get a full path i can just concatinate it with pwd, but what if i am given "../mama"
how do i programmatically convert:
/home/polypus and ../mama into ... (4 Replies)
Discussion started by: polypus
4 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I need to store all the files in a directory to a text file with its full path.
The example below can explain:
./File1.txt
./File2.txt
./Folder1/File11.txt
./Folder1/File12.txt
./Folder1/Folder11/File111.txt
./Folder2/file21.txt
:
:
The ls -R1 command won't give the result as... (5 Replies)
Discussion started by: r_sethu
5 Replies
4. Shell Programming and Scripting
This has been bugging me for a while. How can i list file to show full path.
/directory/test
$ ls file.tst
file.tst
$
desired output:
/directory/test/file.tst (2 Replies)
Discussion started by: ryandegreat25
2 Replies
5. Shell Programming and Scripting
Hi,
I have a file abcd.txt which has contents in the form of full path file names i.e.
$home> vi abcd.txt
/a/b/c/r1.txt
/q/w/e/r2.txt
/z/x/c/r3.txt
Now I want to retrieve only the directory path name for each row
i.e
/a/b/c/
/q/w/e/
How to get the same through shell script?... (7 Replies)
Discussion started by: royzlife
7 Replies
6. Shell Programming and Scripting
/Path/snowbird9/nrfCompMgrRave1230100920.log.gz:09/20/2010 06:14:51 ERROR Error Message.
/Path/snowbird6/nrfCompMgrRave1220100920.log.gz:09/20/2010 06:14:51 ERROR Error Message.
/Path/snowbird14/nrfCompMgrRave920100920.log.gz:09/20/2010 06:14:51 ERROR Error Message.... (0 Replies)
Discussion started by: Shirisha
0 Replies
7. UNIX for Advanced & Expert Users
Hi,
In directory "inoutfiles", I have folders fold0001, fold0002 and so on. Every folder has corresponding file file0001.txt, file0002.txt and so on. I want to perform a certain action on multiple files in one go. The cpp file is in the same directory as "inoutfiles".
This is my code :
... (0 Replies)
Discussion started by: KidD312
0 Replies
8. Programming
Hi,
In directory "inoutfiles", I have folders fold0001, fold0002 and so on. Every folder has corresponding file file0001.txt, file0002.txt and so on. I want to perform a certain action on multiple files in one go. The cpp file is in the same directory as "inoutfiles".
This is my code :
... (1 Reply)
Discussion started by: KidD312
1 Replies
9. Shell Programming and Scripting
Hello,
Splitting a sentence using the full-stop/question-mark/exclamation is a common device. Whereas the question-mark / exclamation do not pose too much of a problem; the full-stop as a sentence delimiter raises certain issues because of its varied use:
just to name a few.
Standard parsers... (9 Replies)
Discussion started by: gimley
9 Replies
10. Hardware
Hello,
Currently we have a Oracle X4100 ( Solaris 10 ) server with disk failure. Originally our hardware team thought the disk can be hot-swap, when they stood in front of the server, none of the disk failure LED were on, so now we have no idea which disk is the bad one for replacement.
As... (2 Replies)
Discussion started by: sunnychen98
2 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)