hey guys
i'm new in this world " unix "
i wanna any websites can help me to learn unix
or any websites i can download UNIX from it
thanks
:D (3 Replies)
I have one script that named testing.sh
#cat testing.sh
#/bin/bash
echo "Enter your name:"
read name
#./testing.sh
Enter your name:
Sanjay
What I need it should take Input in the same prompt(mean to say dun go for next line) like given below.
#./testing.sh
Enter your name:Sanjay
... (1 Reply)
Hallo friends,
I have a log file called xxx.log which is generated everymorning.
I want to change this file to xxx_.log
Please assist, i am using ksh on AIX.
Ta,
Pax (4 Replies)
Just a quick question on grep/egrep.
I am writing a shell script that is looking for certain strings in a text file. It works well and gets exactly what I need.
However, the way the program writes to the text file, it puts the timestamp in a line above the string I am looking for and the path... (3 Replies)
Hi,
iam trying to use lofiadm in solaris 5.10 but getting the following error..
bash-3.00# lofiadm -a /asmdisks/_file_disk1
lofiadm: /dev/lofictl: No such file or directory
i dont see lofictl file in /dev ..
i checked in other similar machines..i found this file..can i export this file from... (2 Replies)
Hi Experts,
I need some suggestion on file grep.
I am trying to find multiple pattern with the file grep as below
grep "2013" trace.log | grep -f pattern.cfg -i > $LOG
if ; then
mail -s "Exception" "sample@abc.com" < $LOG
fi
Is it possible to obtain what pattern I got in the... (5 Replies)
i have this line of code that looks for the same file if it is currently running and returns the count.
`ps -eaf -o args | grep -i sfs_pcard_load_file.ksh | grep -v grep | wc -l`
basically it is assigned to a variable
ISRUNNING=`ps -eaf -o args | grep -i sfs_pcard_load_file.ksh |... (6 Replies)
Discussion started by: wtolentino
6 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)