Hi All,
Long question and possibly a very short answer....
At work we've just got a new 3rd party backup solution (Netvault by Bakbone -it's v. nice), and I'm currently setting up my UNIX clients as part of the backup schedule. It's just occurred to me that there may be certain files or... (4 Replies)
Hi
I would just like to ask if there is a way for UNIX to ignore/overcome the 255 character limit of the command line?
My problem is that I have a really long line of text from a file (300+ bytes) which i have to "echo" and process by adding commands like "sed" to the end of the line, like... (5 Replies)
Dear All,
I am using find command
find /my_rep/*/RKYPROOF/*/*/WDM/HOME_INT/PWD_DATA -name rk*myguidelines*.pdf -print
The problem i am facing here is find /my_rep/*/
the directory after my_rep could be mice001, mice002 and mice001_PO, mice002_PO
i want to ignore mice***_PO directory... (3 Replies)
Hello,
i have bash script where im cycling some command for different lines in external file.
example:
while read domain;do
nslookupout=$(nslookup -type=ns $domain) || true
another commands
done < filenamewithdomains
i added:
|| true
after the command in belief it will just skip... (6 Replies)
Hi,
I want to read a file line by line and exclude the lines that are beginning with special characters. The below code is working fine except when the line starts with hyphen (-) in the file.
for TEST in `cat $FILE | grep -E -v '#|/+' | awk '{FS=":"}NF > 0{print $1}'`
do
.
.
done
How... (4 Replies)
Hi,
I am using following command to find a specific file.
find . -name "find*.txt" -type f -print
I am issuing that command at root directory since I don't know in which sub folder that file is getting created from some other process.
As I am not having access to all directories, my... (3 Replies)
Hi,
How can i ignore case between 2 files in unix using COMM command.
2 input files are:
-bash-4.1$ more x2.txt
HELLO
hi
HI
raj
-bash-4.1$ more x3.txt
hello
hi
raj
COMM command:
-bash-4.1$ comm x2.txt x3.txt
hello
HELLO
hi (3 Replies)
Hello,
I am searching the following string Folder^ in a file and replacing it with Folder^/
However if the file already contains Folder^/ I want to avoid replacing it with Folder^//
To do this I have to do the following today:
1) echo "Folder^" | sed 's/Folder\^/Folder\^\//g'
I get... (2 Replies)
Discussion started by: mehimadri12
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)