I was not able to get that substitution to fly but found a way around it.
My question is that in its present form the script only processes the first file it finds in the parameter. If I give scriptname *FD.CPY , the script only processes the first file matching that description. If I put the above expression in the script instead of $1, it does it on everything (it's supposed to). How can I change it to work on (a) specified file(s) in the parameter?
Hi All,
My query is as below:
Am basically writing a parser script.
My input file has got some variables which are populated by the calling program.
callig program:
fun1("cat","dog","cow")
input.*
argument first
argument second
I want to write a script that should give me... (4 Replies)
Hello all I hope someone can help me. I am trying to convert something I wrote in C to bash.
But how do I go about reading more than one item at a time in a for loop?
i have been using this format for the loops in the bash script i have been building.
e.g.
for word in `cat -s... (4 Replies)
Hi, I have a file with the following data
-0.00000 0.00000 0.00000 F F F
0.00000 0.00000 0.80000 F F F
0.50000 0.50000 0.60000 F F F
0.50000 0.50000 0.20000 F F F
-0.00000 0.00000 0.40000 F F F
I would like to change the last 3 lines from F F F to T T T. I tried looping each line but don't... (5 Replies)
Hello friends,
i wrote a script which includes a couple of if-else loops but i have to change it to while-do loop as it is not allowed to use "break" in if-else loop in bash.
#!/bin/bash -x
NUM=`find . -name ufsdump_output1.txt | xargs egrep "End-of-tape detected"`
if ; then echo "OK!"... (6 Replies)
Hello every one i have an script in sco unix 5.06 to take a long archive over MOD drive and this script contains many line to change destination to DVD anyone can help to me for change this script to take backup on DVD instead of MOD
the attached script LzaModBed.engl (1 Reply)
I need to do something like this:for I in var1 var2 var3 ; do
$I = "Something calculated inside the loop"
doneObviously it doesn't work...but is it possible doing that in other ways?
Thanks in advance. (6 Replies)
I am trying to create an Expect script that does the following:
1) Telnets to an IP address and logs in with user ID and Password
2) Issue a CLI command to the server that will output data of which I am particularly interested in a DS1 clock 'Slips' value. I want to be able to keep issuing... (0 Replies)
Hi guys, i have an executable file that contains several records and fields. One of the records has a variable filed that must be changed each time i want to execute the file. Would it be possible that i can use a loop to change the value of that field? Suppose that the field address is:
Record... (5 Replies)
Hi, I have an N number of files in a directory. I like to write a shell script that would make identical plots for each one of these files.
The files have names such as:
t00001.dat
t00002.dat
t00003.dat
t00004.dat
t00005.dat
.
.
.
t00040.dat
i.e. the... (4 Replies)
Hi,
Extremely new to Perl scripting, but need a quick fix without using TEXT::CSV
I need to read in a file, pass any delimiter as an argument, and convert it to bar delimited on the output. In addition, enclose fields within double quotes in case of any embedded delimiters.
Any help would... (2 Replies)
Discussion started by: JPB1977
2 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)