hi,
given a file
i need to get the first line and secodn line
and count each of the line whether the length of first line and second line is the same
i don;t know how to get the length of the line...seems like use 'wc' cannot do it...
please advice (1 Reply)
hi iam trying to do a specified word count on file
called text
i have a few ideas but don't get the result i want
do any one have a idea
please help
i have this at the moment
cat text
echo "Please enter the word you are looking for:"
read string
echo "the word < $string > occurs in... (5 Replies)
Hi All,
Please let me know how to get the count of a particular word in a file. Example. I am looking for count of word 'result' in a file abc.xml.
Thanks,
Shankar (10 Replies)
dear all,
i have a requirement to count the errors and display from a file.
eg. file1.txt
sjdgfjdgfgd ora-0001 sdjgfydh sdukgh7 23
sjdgfjdgfgd ora-0002 sdjgfydhsf34 ew 34v
sjdgfjdgfgd ora-0008 sdjgfydh asdf asdfas
sjdgfjdgfgd ora-0001 sdjgfydhjkbs ui873
sjdgfjdgfgd ora-0004 sdjgfydh... (9 Replies)
Hi all, I am trying to write a command that can help me count the number of lines in the /etc/passwd file ending in bash.
I have read through other threads but am yet to find one indicating how to locate a specifc word at the end of a line. I know i will need to use the wc command but when i... (8 Replies)
Script that lists all words used in one or more files and displays their count (pattern /\W+/ to split the lines of the input file into words can b used)..
It should display list in format word:count...gets Filename as an cmd line argument!
eg: $perl test doc (where doc is d file we are going to... (4 Replies)
Im trying to make a bash file that will take another file and count how many lines there are and then count how many words are in each line.
Any help would be great. (15 Replies)
Hi,
It is very interesting to learn the unix, i just struck with a doubt like i have below content in my file
xyz
xyz xyz
xyz
i just want know the word count by using grep -wc 'xyz' <filename>,
but it is giving 3 instead of 4.So i understood that it is showing matched line numbers count... (2 Replies)
I am trying to figure out to find word count of each word from my file
sample file
hi how are you
hi are you ok
sample out put
hi 1
how 1
are 1
you 1
hi 1
are 1
you 1
ok 1
wc -l filename is not helping , i think we will have to split the lines and count and then print and also... (4 Replies)
Discussion started by: mirwasim
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)