I AM TRYING TO APPEND THE HOSTNAME OF A UNIX SERVER I WORK WITH SO I COULD DO A LOADING INTO A DATABASE.
THE COMMAND I AM USING IS
df -k | sed 's/^/dataserver /'
What I intend to do is append the hostname dynamically by using the hostname command instead of having to manually enter... (1 Reply)
Hi,
I have a large 0.5gb xml file called ab_cd.xml which looks like this:
<?xml version="1.0"?>
<AB:report xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://abc.com/ab_reporting AB_Reporting_3.xsd" xmlns:AB="http://abc.com/ab_reporting">
--------
--------... (3 Replies)
Hi ,
echo "07/05/2008" | sed 's/\(..\)\/\(..\)\/\(..\)/\3\2\1/'
Output :: 20050708
Expected output is 20080507
Iam not getting the bug in this.
Thanks for the help
-- penchal (4 Replies)
Hi,
I have to use SED to remove the prefix "219-" from a text file containing phone numbers and I have to remove the ":" as well. I write the following code but it does not seem to work. Can someone help me please?
mohit@mohit-desktop:~$ sed -n s/219-/" "/p corp_phones_bak > noprefix1... (2 Replies)
Hi All!
I am trying to use shell variables in a sed statement, but facing an error.I used the double quotes instead if single quotes in the sed statement.
# sed -i -e "s/password/$decoded/g;" $CATALINA_HOME/conf/server.xml
sed: -e expression #1, char 11: unterminated `s' command
#
... (5 Replies)
I have a file with a lot of numbers in it and I need to clean it up and make it look nice and proper. I found this little gem of a one-liner and basically understand what it is doing but I would like to further understand what each part of the command is doing. Being a newb, I am just trying to... (2 Replies)
Hi all
In input file I have records like this:
0,1,0,87,0,0,"6,87","170,03",0,"43,5",0,0,0,0,"6,87","126,53"and in output file I need that these records transforms in :
0 1 0 87 0 0 6,87 170,03 0 43,5 0 0 0 0 6,87 126,53
Could you help me in this case? Please (3 Replies)
Hi Folks,
I want to replace these numbers with words as the following:
$echo 1 11 223
I want to replace each number with it name (e.g. "1" replaced with "one", etc.) just to determine how sed works in such case. Thanks in advance:).
Leo (8 Replies)
I don't know if you guys get this problem sometimes at Terminal but I had been having this problem since yesterday :( Maybe I overdid the Terminal. Even the codes that used to work doesn't work anymore.
Here is what 's happening:
* I wanted to remove lines containing digits so I used this... (25 Replies)
Discussion started by: Nexeu
25 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)