Hi,
I want to find out whether a string contains non numbers and + and -
example :
Str="0005000A" - It contains A
Str="0005000+" - No problem
What I have done is ,
echo $Str | grep
I will have to list out all non numeric characters... (6 Replies)
Hi i would like to add line numbers to end of each line in a file.
I am able to do it in the front of each line using sed, but not able to add at the end of the file.
Can anyone suggest
The following code adds line number to start of each line
sed = filename | sed 'N;s/\n/\t/'
how can i... (5 Replies)
Hello,
I'm trying to grep for digits surrounded by non digits and I'm obviously misinformed. Could someone help me get this sorted out
here is what I have that is not working
grep -ho '\D(\{11\})\D' *.txt (5 Replies)
Hi all,
I am new to unix and struggling to do the below
I have few lines in a xml
<title>abc:1</title>
<description>abc:2</description>
<language>abc:3</language>
Is it possible to extract only the entire word like abc:1 abc:2 abc:3 instead of the entire line into a new file . Kindly... (3 Replies)
I have a txt file with more than 10000 lines. There is a unique pattern which is scattered into the file. it starts with @9 and it has 15 characters. i need to grep them and display along with line numbers.
Eg: File - Test1
test message....
....
..
..
@9qwerty89
...test message... (8 Replies)
I know if i use grep -n that the output will have the lines numbered but is there a way to grep the actually line number.
so like this
grep -n "one" /usr/dict/numbers
1:one
21:twenty-one
31:thirty-one
41:forty-one
51:fifty-one
61:sixty-one
71:seventy-one
81:eighty-one
91:ninety-one
... (1 Reply)
Hi! I'm trying to assign line numbers to each line of the file
for example consider the following..
The contents of the input file are
hello how are you?
I'm fine.
How about you?
I'm trying to get the following output..
1 hello how are you?
2 I'm fine.
3 How about you? ... (8 Replies)
I am trying to extract specific information from a large *.sam file (it's originally 28Gb).
I want to extract all lines that are on chr3 somewhere in the range of 112,937,439-113,437,438.
Here is a sample line from my file so you can get a feel for what each line looks like:
seq.4 0 ... (8 Replies)
I'm trying to grep lines where the digits at the end of each line are greater than digits. Tried this but it will only allow me to specify 2 digits. Any ideas would greatly be appreciated. grep -i '\<\{3,4,5\}\>' file
---------- Post updated at 05:58 PM ---------- Previous update was at 05:41... (1 Reply)
Hai,
I want to select only line numbers into a file if some pattern matches. I have written my script like below but its not working.
#!/bin/sh
file='/home/testfile1'
filesearch='/home/test00'
while read line
do
search=`echo $line |cut -c 1-24`
echo $search
echo `grep -n ""... (3 Replies)
Discussion started by: Subbu123
3 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)