Hi,
I want to find the files available in a directory /var/user/*/*/data/.
I tried using the command "find /var/user/ -path '*/*/data/ -name '*' -type f" it says find: 0652-017 -path is not a valid option and then i tried using "find /var/user/ -name '*/*/data/*' -type f" but its not... (3 Replies)
I suspect this is commonly done, but haven't found the right combination of search terms to find the answer.
I want to grep for lines in .cpp files that contain only 1 '=' sign in an if statement. e.g.,
if (a = b) -- find this
if (a==b) -- don't find this
My attempt:
egrep... (7 Replies)
I'm trying to math all class references in a C++ file using grep with regular expression. I'm trying to know if a specific include is usuless or not, so I have to know if there is a refence in cpp.
I wrote this RE that searches for a reference from class ABCZ, but unfortunately it isn't working... (0 Replies)
Hi,
in the cobol copy books is there any regular expressions to be used in awk to fetch the length of each columns?
below mentioned are the examples.
Copy Book Sample
01 tablename.
02 group header.
03 col1 s9(10)V99.
03 Col2 s9(10)V9(3).
03 Col3 XXXX
02... (7 Replies)
Hello everyone,
first post here, trying to learn scripting on my own and this forum as been really helpful so far. I made few little scripts working great but I m facing some problems with RE.
I have a bunch of files in many subdirectories called *001.ext *002.ext OR simple *.ext or *01.ext... (7 Replies)
I have 3 files names as HU123.IHS ,SU345.IHS DU567.IHS
I have written a script to copy the files to the destination server but I am getting the error.
/bin/cp '/dun/homes/11.3.7/packages/HU*.IHS' /dun/homes/11.3.7/Target
But I am getting one error :-
/bin/cp: cannot stat... (1 Reply)
Hi all,
How am I read a file, find the match regular expression and overwrite to the same files.
open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat";
open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat";
while (<DESTINATION_FILE>)
{
# print... (1 Reply)
Hello,
I am trying to use regex wtih find command in KSH. For some reason it is not working as expected.
Input:
comm_000_abc_0102.c
comm_000_abc.c
456_000_abc_1212.cpp
456_000_abc_.cpp
Expected Output:
comm_000_abc_0102.c
kkm_000_abc_8888.cpp
(Basically I want to find all... (6 Replies)
Hi all
I have a list of file names in array. But this file names are not exact. so i want to search whether a file exists or not using regular expression.
code snippet:
if ;
then
echo "File exists"
else
echo "File does not exits"
fi
over here "*EQST*" should be treated as a regular... (4 Replies)
Hi Gurus,
I need to identify the file with below format:
ABC20110101.DAT
ABCD2011010103.DAT
If I use ABC*\.DAT, it get two file. I want to get file after "ABC' then number, the ".DAT".
I tried
ABC* but it doesn't work.
Thanks in advance. (9 Replies)
Discussion started by: ken6503
9 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)