Selecting a part of the text (regex pattern, awk, sed) Post: 302455514

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Selecting line ahead and next using AWK or SED

:confused: Good Day, I have this script that gets the archive names and the time it applies based on the alert log. The application of archives are of daily basis and usually many so having this script helps my job become easier. My problem is that when i get all the time stamps and...

2. Shell Programming and Scripting

RegEx for text pattern

Hi, Please help me write regex for text pattern like CONTACT PEOPLE:first_name1.last_name1,first_name2.last_name2,first_name3.last_name3, ...so on Any advice is Okay! Thanks in advance.

3. Shell Programming and Scripting

sed to awk (regex pattern) how?

Hello, I am trying to covert a for statement into a single awk script and I've got everything but one part. I also need to execute an external script when "not found", how can I do that ? for TXT in `find debugme -name "*.txt"` ;do FPATH=`echo $TXT | sed 's/$.*$\/$.*$/\1/'` how...

4. UNIX for Dummies Questions & Answers

blank space in regex pattern using sed

why does sed 's/.* //' show the last word in a line and sed 's/ .*//' show the first word in a line? How is that blank space before or after the ".*" being interpreted in the regex? i would think the first example would delete the first word and the next example would delete the second...

5. Shell Programming and Scripting

Using Sed to remove part of line with regex

Greetings everyone. Right now I am working on a script to be used during automated deployment of servers. What I have to do is remove localhost.localdomain and localhost6.localdomain6 from the /etc/hosts file. Simple, right? Except most of the examples I've found using sed want to delete the entire...

6. Shell Programming and Scripting

Selecting specific 'id's from lines and columns using 'SED' or 'AWK'

Hello experts, I am new to this group and to 'SED' and 'AWK'. I have data (text file) with 5 columns (C_1-5) and 100s of lines (only 10 lines are shown below as an example). I have to find or select only the id numbers (C-1) of specific lines with '90' in the same line (of C_3) AND with '20' in...

7. Shell Programming and Scripting

Replacing part of a pattern in sed

Hi I have a piece of xml that has a pattern like this <int>159</int><int>30</int> I want to find this pattern but only substitute the second part of the pattern to {rid1}. Is that possible in sed ? Thanks. ---------- Post updated at 12:10 PM ---------- Previous update was at 12:01 PM...

8. Shell Programming and Scripting

SED: Pattern repitition regex matching

Fairly straightforward, but I'm having an awful time getting what I thought was a simple regex to work. I'll give the command I was playing with, and I'm aware why this one doesn't work (the 1,3 is off the A-Z, not the whole expression), I just don't know what the fix is: Actual Output(s): $...

9. Shell Programming and Scripting

Regex in sed to find specific pattern and assign to variable

10. UNIX for Advanced & Expert Users

sed REGEX to print multiple occurrences of a pattern from a line

I have a line that I need to parse through and extract a pattern that occurs multiple times in it. Example line: getInfoCall: info received please proceed, getInfoCall: info received please proceed, getInfoCall: info received please proceed, getInfoCall: info received please proceed,...

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)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Selecting line ahead and next using AWK or SED

Discussion started by: ownins

2. Shell Programming and Scripting

RegEx for text pattern

Discussion started by: rider29

3. Shell Programming and Scripting

sed to awk (regex pattern) how?

Discussion started by: TehOne

4. UNIX for Dummies Questions & Answers

blank space in regex pattern using sed

Discussion started by: glev2005