I have to second Don Cragun in his interpretation. No flags are set by default. Quick verification on FreeBSD 9.0-RELEASE shows:
Code:
touch XX
ls -loa XX
-rw-r--r-- 1 root wheel - 0 Mar 6 23:58 XX
chflags opaque XX
ls -loa XX
-rw-r--r-- 1 root wheel opaque 0 Mar 6 23:58 XX
chflags arch XX
ls -loa XX
-rw-r--r-- 1 root wheel arch,opaque 0 Mar 6 23:58 XX
by what name does a core dump file stored???
like i wrote a test code:
//dump.c
main()
{
char *p=NULL;
printf("%s",p);
}
of course the above code will produce a segmentation fault. but i cant see any file named core in my CWD. am using SUN0S 5.9 (6 Replies)
Hi All,
I have several .gz files and i need to see the contents of these file, without extracting these file. If i extract these file the space will be full so. I need to see the contents and parse the contents to a script to extract data from these.
Please let me know if you need any more... (10 Replies)
I am trying to view the files in /etc/security/audit/SERVERNAME/files, but when I gunzip them and then do a cat I get a bunch of garbage with some stuff that makes sense. I need to view this file without having all the garbage. I tried to cat it and vi it without any luck. Can someone show me an... (4 Replies)
Hi all ,
I have a view in teradata , the ouput of that view have to be stored as a file with delimitere as '|'.Is there any possibility of doing this in unix ?
Thanks in advance ,
Vinoth (6 Replies)
Hi All,
I am experiencing a strange and serious issue.
I can see, a file exist there inside a directory
while doing cat i can see the file exists, but while trying to view that its saying NO such File or Directory.
(ipbala01)/env/balast7/app/working/batch_loader/data/system_2/input>ll
total 12... (8 Replies)
Hi,
I have the following gcov compilation flags in all the QT source code project (*.pro) files.
CONFIG(gcov) {
LIBS += -lgcov
QMAKE_CXXFLAGS += -fprofile-arcs -ftest-coverage
}
Now, I want to remove these flags off my files. Please help me with a script to... (1 Reply)
Hi to all,
1- I'm trying to open a certain file in unix with the tool KEA!
2- i get to the correct folder with the CD command
3- Once in the correct directory i try the following unix command:
vi NameOfFile.Z
4- Yes those files finish with a .Z
5 - I get something in the KEA!... (3 Replies)
See attached video for a demo on how to move back and forth from the desktop view to the mobile view.
Currently this only works for the home page, but I will work on some new PHP code in the future to make this work with the page we are currently on.
Edit: The issue with making every page ... (2 Replies)
Discussion started by: Neo
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)