Changing values in the first column. Post: 302881182

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Changing one column of delimited file column to fixed width column

Hi, Iam new to unix. I have one input file . Input file : ID1~Name1~Place1 ID2~Name2~Place2 ID3~Name3~Place3 I need output such that only first column should change to fixed width column of 15 characters of length. Output File: ID1<<12 spaces>>Name1~Place1 ID2<<12...

2. Shell Programming and Scripting

How to pick values from column based on key values by usin AWK

Dear Guyz:) I have 2 different input files like this. I would like to pick the values or letters from the inputfile2 based on inputfile1 keys (A,F,N,X,Z). I have done similar task by using awk but in that case the inputfiles are similar like in inputfile2 (all keys in 1st column and values in...

3. Shell Programming and Scripting

print unique values of a column and sum up the corresponding values in next column

Hi All, I have a file which is having 3 columns as (string string integer) a b 1 x y 2 p k 5 y y 4 ..... ..... Question: I want get the unique value of column 2 in a sorted way(on column 2) and the sum of the 3rd column of the corresponding rows. e.g the above file should return the...

4. Shell Programming and Scripting

Cat Values from Several files if it meets criteria for column values

I have results from some statistical analyses. The format of the results are as given below: I want to select lines that have a p-value (last column) less than 0.05 from all the results files (*.results) and cat to a new results file. It would be very nice if a new column is added that tells...

5. UNIX for Dummies Questions & Answers

shift values in one column as header for values in another column

Hi Gurus, I have a tab separated text file with two columns. I would like to make the first column values as headings for the second column values. Ex. >value1 subjects >value2 priorities >value3 requirements ...etc and I want to have a file >value1 subjects >value2 priorities...

6. Shell Programming and Scripting

Converting odd values to even values(or vice-versa) located in a column

Hello All, I have a below data in a .csv file where all rows where col1 is A, col2 is odd numbers, similarly even numbers for all rows where col1 is B. Note that my data has some other columns(not shown here) too (around 100) after col2. Tool,Data A,1 A,3 A,5 .... so on B,2 B,4 .... ...

7. UNIX for Dummies Questions & Answers

Changing values of a column based on formula

Hi, I have a tab delimited text file with two columns where the second column takes on values between 1 and 6 (including). If the value of the second column, includes 1,2,3 I want to replace it with LOW. If it is 4,5,6 I want to replace it with HIGH. How do I go about doing that? Thanks ...

8. UNIX for Dummies Questions & Answers

Changing the values of a column using awk and gsub

Hi, I am using the following code to change NA to X in only the 5th column of my text file: awk '{gsub("NA","x",$5)}1' in.file > out.file How can I modify this code if I want to change NA to X in multiple columns of the text file (i.e. columns 5,6 and 7). Thanks!

9. Shell Programming and Scripting

awk Print New Column For Every Two Lines and Match On Multiple Column Values to print another column

Hi, My input files is like this axis1 0 1 10 axis2 0 1 5 axis1 1 2 -4 axis2 2 3 -3 axis1 3 4 5 axis2 3 4 -1 axis1 4 5 -6 axis2 4 5 1 Now, these are my following tasks 1. Print a first column for every two rows that has the same value followed by a string. 2. Match on the...

10. Shell Programming and Scripting

Changing values only in 3rd column and 4th column

#cat file testing test! nipw asdkjasjdk ok! what !ok host server1 check_ssh_disk!102.56.1.101!30!50!/ other host server 2 des check_ssh_disk!192.6.1.10!40!30!/ #grep check file| awk -F! '{print $3,$4}'|awk '{gsub($1,"",$1)}1' 50 30 # Output:

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)