Given: bash-2.03$ command -a option1 name1 name2
Is there a better way to do this?
Note that the command may or may not have options, and the options can be interchanged (ex. bash-2.03$ command name3 -a option2)
also I need to check for this:
-> Should I make this an error?
kindly advise.
Thanks!
Last edited by Franklin52; 02-15-2012 at 03:32 AM..
Reason: Please use code tags for code and data samples, thank you
HI! All
iam using Split command to split a large .txt file in to smaller files,
The syntax iam using
split -25000 Product.txt
iam getting four output files but not in .txt format but in some other format ,
when i checked the properties the Type of the output files is Type
can any... (7 Replies)
my description from another thread...
here's my code:
#!/bin/bash
IFS=$'\n'
function OutputName() {
input=$1
echo $input
input=`echo "$input" | sed -e 's/.//'`
input=`echo "$input".avi`
output_name=$input
}
if ]; then
echo... (5 Replies)
Just I gone with the script, I found some command's options which are not compatible with " HP-UX ".
If I found any alternate commands to the following, most probably I will solve the issue here.
1. " iostat -x " --> this command's option( x ) is not available in HP-UX... (2 Replies)
Hi
I want the 'ls' command to display only the file size,date modified and name of the file.What i could see with different options is this:
$ls -got packagecount.csv
$-rwxrwxrwx 1 393137 Aug 21 14:46 packagecount.csv
Now what should be my possible... (4 Replies)
I have to use shell script to run series of commands on another unix box by connecting through SSH and giving user credentials. For running commands on remote machine I have to use options reading from a local file.
Process:
Connecting to remote unix server <host1.ibm.com> through ssh
Login: ... (2 Replies)
I'm reading about debugging aids in bash and have come across the set command. It says in my little book that an addition to typing
set
you can also use them "on the command line when running a script..." and it lists this in a small table:
set -o option Command Line... (5 Replies)
I have the following code and I am calling it using
./raytrac.bash -u
and getting problems. For some reason opt_usage is still 0.
opt_usage=0
iarg=0
narg=$#
while (($iarg < $narg))
do
(( iarg = $iarg + 1 ))
arg=$argv
usrInputFlag=`echo $arg | awk '/=/ {print 1}; ! /=/... (22 Replies)
I am reading arguments passed to a C++ program which accepts long options.
Long options start with '--', with the value joined with the option by an = sign, with no intervening spaces.
An example is as follows:
programName --vdz=15.0
I want to store 'vdz' in variable 'key', whereas... (4 Replies)
Hi,
I have this command in a shell script and I can get it to echo ok, but when I try to execute the command I get a "file not found" error. Which is strange because, if I copy and paste the same command at the cli it works ok.
What am I doing wrong please? (16 Replies)
Hi,
If I want to list files with names containing a certain letter like " a " using just one ls command, is there any way of doing that?
Note that it is containing a letter instead of one of the following (starting, ending with a letter or having the letter in between). what I want is to show... (1 Reply)
Discussion started by: AAAnni
1 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)