Hello,
I need help with a program I'm trying to write for my moms science class, what it has to do is accept a user inputed string and search for it in a text file (file contains all the elements)
The file looks like:
H Hydrogen 1
He Helium 2
Li Lithium 3
Be Beryllium 4
...
If the... (1 Reply)
Hello,
I need help with a program I'm trying to write for my moms science class, what it has to do is accept a user inputed string and search for it in a text file (file contains all the elements)
The file looks like:
H Hydrogen 1
He Helium 2
Li Lithium 3
Be Beryllium 4
...
If the... (0 Replies)
Hi Champs,
I am a newbie to unix world, and I am trying to built a script which seems to be far tough to be done alone by me.....
" I am having a raw csv file which contains around 50 fields..."
From that file I have to grep 2 fields "A" and "B"....field "A" is to be aligned vertically... (11 Replies)
Right now, my code is:
s/Secondary Ins./Secondary Ins.\
1/g
It's adding a 1 as soon as it finds Secondary Ins.
Primary Ins.: MEDICARE B DMERC Secondary Ins.
1: CONTINENTAL LIFE INS
What I really want to achieve is having a 1 added on the next line that contain "Secondary Ins." It... (4 Replies)
Hi All,
I am trying to to compare a string variable with a string literal inside a loop but keep getting the
./testifstructure.sh: line 6:
#!/bin/sh
BOOK_LIST="BOOK1 BOOK2"
for BOOK in ${BOOK_LIST}
do
if
then echo '1'
else
echo '2'
fi
done
Please use next... (1 Reply)
Hi,
I need to replace and append a string in a text if grep is true. For eg:
grep ABC test.txt | grep -v '\.$' | awk {'print $4'} | sed "s/ ?
How do I replace all instances of "print $4" using sed with another sring? Eg of the string returned will be,
lx123
web222
xyz
Want to... (8 Replies)
Hi ,
I have a file likeA-0044150|ABC/Frito/
A-0044150|GFHU
A-0150075|Bud Racing
A-0187811|Bud Light
A-0187811|RW&B signmaking
I Want the o/p likeA-0044150|ABC/Frito/,GFHU
A-0150075|Bud Racing
A-0187811|Bud Light,RW&B signmaking (2 Replies)
Hi All,
I'm trying to insert a string into a file at a specific location.
I'd like to add a string after the parent::__construct(); in my file.
<?php if (! defined('BASEPATH')) exit('No direct script access allowed');
class MY_Controller extends CI_Controller {
function... (6 Replies)
Hi Friends,
Good morning.
Appended a particular string after occurrence of particular string in a file.
my file abc.sql as below
create or replace function f1(p_cust_no IN VARCHAR)
RETURN number IS
DECLARE
v_country country.customer_tbl%TYPE;
begin
begin
select... (4 Replies)
Discussion started by: ram0106
4 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)