Checking commandline Post: 302761641

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

list only directories in commandline.

I want to list only directories in the command line using ls command. Can anyone please help me.

2. Shell Programming and Scripting

Validating commandline argument

Hi, I am calling a script script2.shl from script1.shl as below script2.shl "TABLE_NAME" -r 10 In that I have to validate the parameter 4. i.e : it should be only 10 20 30 40 50 I know that I can do it by checking like below if ]; then echo "TRUE" else echo "FALSE" fi ...

3. Shell Programming and Scripting

$OPTARG changes commandline input

Hi there, I hope, that I do not open an thread, that is already existing, but I didn't found something matching with my problem while searching for problems with "getopts" My problem ist, that I'm taking arguments from commandline into my script with getopts, I've an flag -s, after that there...

4. Shell Programming and Scripting

Using curl in commandline

Hi, I am using curl to hit a url using http in solaris 10 using commandline, I want to transfer an attachment(using multipart curl -F) also as a part of the request. If anyone has used kindly help me with the syntax. I am using below command: /usr/local/bin/curl -v...

5. Shell Programming and Scripting

Multiple commandline switches

I have a script that has commandline switches that work no problem. But i don't know how to enable it to have multiple switches at one time. So I'd want myscript -h -o or even myscript -ho but i'm having no luck incorporating this. I tried shifting but i'm not getting it. Thanks ----------...

6. Shell Programming and Scripting

AWK Script and Commandline difference

Hey there, I just stumbled upon a difference between using awk on the commandline and using it in a shellscript. I have a variable, e.g.: PROG=vim then i want to check if the package with this name is installed: TEMPVAL=$(dpkg -l | awk '{ if ($2 == "$PROG") print $2 }') (Im using...

7. OS X (Apple)

Opening Applications from the commandline

as you probably/may know, one can open any application from the application folder with the command open -a program_name I found that out today and so I created aliases in .bash_profile and they work. alias safari="open -a safari" alias gimp="open -a gimp" alias seamonkey="open -a...

8. UNIX for Dummies Questions & Answers

Load config file at commandline

Hello, This would be very basic question to most of you, but for me as a newbie it is an un-know. I would like to load a configuration file into memory before executing a specific command. For example: I have a config file that holds all the database connectivity information and I'd like to...

9. Shell Programming and Scripting

Script executed by Cron or commandline

Hello all, I have a question regarding the difference betwen cron and command line. What I would like to do is to print a statement into a logfile if a script has been executed from cron or from command line. It should be as: #!/bin/bash if <Check if this script has been...

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)