What is the command to count lines in a files, but ignore blank lines and commented lines?
I have a file with 4 sections in it, and I want each section to be counted, not including the blank lines and comments... and then totalled at the end.
Here is an example of what I would like my... (6 Replies)
I have a data file in the following format (refer to input file) with multiple lines containing some information. I need an output file to loop thorough the input file with summarized information as seen below (refer to output file) ‘Date Time' and ‘Beta Id' input file values should be concatenated... (7 Replies)
Please help in the following problem:
Input is:
Pritam
123
456
Patil
myname
youname
Pritam
myproject
thisproject
iclic
Patil
remaining text
some more text
I need the command which will display the no of lines between two words in the whole file.
e.g. Display all the no of lines... (5 Replies)
Hi!
I have a file that looks like this:
AAG
----------------------------------------------------------------------
Number of residues in the repeat = 3
AGA
----------------------------------------------------------------------
Number of residues in the repeat = 3
AGG
... (2 Replies)
Hi,
I had posted few days back and got replies on how to extract patterns from a file.
I had another question. I want to count the number of lines a particular pattern. I thought of somethings like using NF variable, etc, but they didnt work.
Here is sample input.
... (9 Replies)
I have a file that I need to merge with another like file. Normally I remove the trailer reocrd and merge the file and update the trailer record of the second file. I did a WC -l on the first file before I removed the trailer record, and again afterwards. The count came back the same. I opened the... (6 Replies)
I try to count number of lines of a data.txt file and then if number of lines is greater than 1 then email me the file.
I could not find what is wrong with my code, hope you can point out the mistake i made
#! /bin/ksh
count =`cat /from/file/data.txt | wc -l`
if ]; then
mailx -s... (4 Replies)
I have 2 files, and I want to count how many lines contain matching words.
Example:
file1
a_+b
a_+b_+c
file2
ab a_+b
a_+bc
I want to get 1, as the the first line of file1 is a substring of the first line of file2. While the second line isn't.
I suspect using sdiff, but not sure how to... (3 Replies)
Hi all,
I have my script to execute number of commands (command line interface) using TCL.
the execution and response of the commands get stored in some log file.
While the execution is going on i need only the time of execution and the number of line getting executed to be displayed in... (1 Reply)
I am tiring to cont numbers of line between the "!" in CISCO routers
I have no problem to extract the input and change the empty line with !
!
5 Cable5/0/1 U0 4
5 Cable5/0/1 U1 4
!
5 Cable5/0/1 U2 4 ... (4 Replies)
Discussion started by: sharong
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)