Hi,
Is it possible to accept a filename as command line parameter and then write to that file using command redirection? i tried the below script.
outputfile=`echo $1`
echo "Writing to file" > 'echo $outputfile'
exit $returncode
but it isnt working. is there any other way to... (9 Replies)
hi
i have a file contains data
Line timeout:
START->SIGNON_REPLY,
SIGNON_REPLY->SIGNON,
Received SOT req
SOT request:
SIGNON->SOT_REPLY,
SOT_REPLY->DATA_RECEIVE,
DATA_RECEIVE->EOD,
i need to write into one line , separated by commas
please help
thanks
Satya (2 Replies)
Hi,
I'm reading and writing a line from one file to another.
Input line is like this:
My name is David. Working on a shell script now.
When I use "echo" or "print" output comes like this,
My name is David. Working on a shell script now.
Sample... (7 Replies)
I need to write value of variable $version at a particular line in a text file.
Line number is determined by another variable &line......I don't know how to do it in shell script ... (2 Replies)
Hi,
I have to write s script to check an input file for invalid characters. In this script I have to find the exact line of the invalid character. If the input file contain 2 invalid character sat line 10 and 17, the script will show the value 10 and 17. Any help is appreciated. (3 Replies)
Dear All,
I have a question that's been difficult to get an answer to.
I often write command line loops, e.g. find files, print name, grep for term, apply sed, etc
I use both zsh and bash.
When I write a loop e.g.
for line in `more myfile.txt`
> do
> echo $line
> done
but... (2 Replies)
Given a particular line number and a corresponding column number, can i write something in the file during run time?
For example x=1 and during runtime i want to write the value of x in column 100 of every line of a given file, then how shud that be done?
Thanks (9 Replies)
Hi,
I have one input file with the following content:
MY_inpfile.txt
Aname1 Cname1 Cname2 1808 5
Aname2 Cname1 1802 47
Bname1 ? 1819 22
Bname2 Cname1 1784 11
Bname3 1817 9
Zname1 Cname1 1805 59
Zname2 Cname1 Cname2 Cname3 1797 27
Every line in my input file have a 4 digit... (5 Replies)
Hello
I am facing a very unique problem and not able to understand why. I have written a function which will check header of the file. If header is present good else it will write the header on top
def writeHeaderOutputCSV(fileName):
# See if the file exist already
try:
... (0 Replies)
Discussion started by: radioactive9
0 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)