Guys im using bash and for me i think its the best shell, anyway which conf file related to bash ? is it $SHELL or .profile i want to add path to it so i dont need to type the full path of the binary file, i also want to configure the behaviour of the shell, please help. (1 Reply)
okay i'm going to try to say this uber-simple:
I use dropbox (file-sync service). in order for dropbox sync files, they must be its children eg. somewhere under /home/jzacsh/Dropbox].
I want to now use it to keep my development files in sync across my machines:
easy: just move my dev. files... (2 Replies)
Hi,
I want to use a config file as the base file and parse over the values of country and city parameters in the config file and generate separate config files as explained below.
I will be using the config file as mentioned below:
(config.txt)
country:a,b
city:1,2
type:b1... (1 Reply)
Hi,
I am writting a script and i am using SYBASE database. i have a config file with my logging credentials. when i am calling the file via isql command its throwing me an error. see the below code.
while read line
do
SERVER=`echo $linea |awk -F"|" ' {print $1} ' `
... (6 Replies)
Hi Guys,
I need some help related to my script... I will explain you briefly about my script and requirement
I written one script which will monitor all my services in the server and send a mail to me....
There are about 10 Services(Processes) running on my services, and I have written 10... (1 Reply)
Hi I am new to shell scripting. There is a requirement to write a shell script to meet follwing needs.Prompt reply shall be highly appreciated.
script that will compare two config files and produce 2 outputs - actual config file and a report indicating changes made.
OS :Susi linux ver 10.3.
... (4 Replies)
Hi -
I am trying to do a simple config file with known variable names in it, e.g.:
contents of config file a.conf: -a
-b $work
-c $host
simplified contents of bash script file: work='trunk'
host='alaska'
opts=$(tr '\n' ' ' < a.conf)
opts="$opts $*"
mycommand $opts arg1 arg2
The... (3 Replies)
Hi ,
I have a config _file that has 3 columns (Id Name Value ) with many rows . In my bash script i want to be able to parse the file and do a mapping of any Id value
so if i have Id of say brand1 then i can use the name (server5X) and Value (CCCC) and so on ...
Id Name ... (2 Replies)
I want to make a config file which contain all the paths.
i want to read the config file line by line and pass as an argument on my below function.
Replace all the path with reading config path line by line and pass in respective functions.
how can i achieve that?
Kindly guide.
... (6 Replies)
I just want to make sure I am understanding how to pass a config file to a bash script . In the below I pass to arguments to a script, then define them in the script as id and config. I then source config using ., if I understand correctly the variables in the config file can now be used by the... (11 Replies)
Discussion started by: cmccabe
11 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)