I am using GnuWin32 sed and am having trouble with the regexp - i.e., they don't behave the same way as in UNIX (POSIX and and all that). I have a stream of data, e.g.:
11111'222?'22'33?'333'44444'55555'
I want to insert a \n after those apostrophes that are *not* preceded by a ?.
... (2 Replies)
Hi,
I am new to using Sed. I have a file containg lines like the following:
INFORM----Test.pc:168:10/11/05 12:34:26 > some text goes here..
TRACE-----Test.pc:197:10/11/05 12:34:26 > some text goes here..
My requirement is to replace 10/11/05 12:34:26 with a string <RUNDATE> (including <... (4 Replies)
Hi guys,
I know that this topic has been discuss numerous times, and I have search the net and this forum for it.
However, non able to address the problem I faced so far.
I am on Solaris Platform and unable to install additional packages like the GNU date and gawk to make use of their... (5 Replies)
I installed the GnuWin32 tools on my Windows XP system but I cannot .. for the life of me .. get the SED tool to work for me.
All I need to do is remove blank lines for a text file. My script is ...
sed -e '/^$/ d' xxx.txt > yyy.txt
The error msg is: sed: -e expression #1, char 1: unknown... (1 Reply)
I want to instert Category:XXXXX into the 2. line
something like this should work, but I have somewhere the wrong sytanx. something with the linebreak goes wrong:
sed "2i\\${n}Category:$cat\n"
Sample:
Titel Blahh Blahh abllk sdhsd sjdhf
Blahh Blah Blahh
Blahh
Should look like... (2 Replies)
I have tried everything I can think of to get sed to change line N of a file to the contents of a variable. I have Googled the Internet, and I find lots of people telling how to use variables with the "Substitute" command, but no one telling how to use variables with the "Change" command.
I... (4 Replies)
Hello everyone,
i wonder if someone could give me an advice regarding the following problem using sed.
Given ist a structure as shown below:
<aaa>text1<b>text2</b>text3<c>text4</c>text5</aaa>
Now I want to change the outer tag from "aaa" to "new" and replace all tags inside the outer tags... (4 Replies)
Hi, I have the following command that parses an xml file to read a node <port>'s value. Hoever the output comes with spaces.
My requirement is to trim the spaces around the value and assign to a variable.
sed -n 's|<port>\(.*\)</port>|\1|p' ../cfg.xml
How do I go about it? (6 Replies)
I have a below syntax its working fine...
var12=$(ps -ef | grep apache | awk '{print $2,$4}')
Im getting expected output as below:
printf "%b\n" "${VAR12}"
dell 123
dell 456
dell 457
Now I wrote a while loop.. the output of VAR12 should be passed as input parameters to while loop and results... (5 Replies)
Discussion started by: sam@sam
5 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)