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1. Shell Programming and Scripting
I have two files, file1 and file2 who have identical number of rows and columns. However, the script is supposed to be used for for different files and I cannot know the format in advance. Also, the number of columns changes within the file, some rows have more and some less columns (they are... (13 Replies)
Discussion started by: maya3
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2. Shell Programming and Scripting
Hello,
Can someone please help in below requirement.
My requirement is to add date before to first column,some text before 1st,2nd coulmns and insert a new column in between 2 and 3 columns.
input file.
aa 123 dddd
aa 667 kdkdk
ddj 738 kkkk
aa 123 dddd
aa 667 ... (5 Replies)
Discussion started by: Cva2568
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3. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Here is what I am supposed to do, word for word from my assignment page:
1. Create/modify and print a... (2 Replies)
Discussion started by: Jagst3r21
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4. Shell Programming and Scripting
Hello
I have a file as below
chr1 start ref alt code1 code2
chr1 18884 C CAAAA 2 0
chr1 135419 TATACA T 2 0
chr1 332045 T TTG 0 2
chr1 453838 T TAC 2 0
chr1 567652 T TG 1 0
chr1 602541 ... (2 Replies)
Discussion started by: plumb_r
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5. Shell Programming and Scripting
Hello,
I am using AWK in UBUNTU 12.04.
I have a dataset as follows:
1 2 12 1 4 1 4 1 7 9 4 6
1 2 4 5 7 8 45 7 4 5 7 5
What I want to do is to add the values of some columns to each other and print it in the same file as the new column while omitting the previous two columns to have... (3 Replies)
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6. Shell Programming and Scripting
Hi,
I have a problem that I am trying to solve and would greatly appreciate some input to solve this. I have a file containing variable length of line. Each line in the file has values separated by "," and i need to grep for these values in a some files. For example below is a sample file with 3... (12 Replies)
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7. Shell Programming and Scripting
Hi.
I have a for loop that I use to extract integer values in a shell script (ksh). Now, I would like to add the values. My preference, from my c programming days, would be to do something like the commented out line below in the for loop. However, this is not recognised. So I use the line... (2 Replies)
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8. Shell Programming and Scripting
This is for an Oracle journal import. I was using a pl/sql package and oracle API's. Oracle added invoker rights to their API's and now my package won't run. I didn't want to use their API's anyway. The only reason i was using pl/sql and the API's (just a package) was to utilize a cursor. How... (2 Replies)
Discussion started by: lmu
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9. Shell Programming and Scripting
Hi
I am trying to add variables(float values) in a unix script but am getting an error
value=`expr $a + $b + $c`
The error I am getting is "expr: non-numeric argument"
I guess it has got to something with the decimal points.
Plz help (13 Replies)
Discussion started by: akashtcs
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10. Shell Programming and Scripting
Hey everyone!
I have a need to add 2 files together as columns.
For instance, I have one file that has several rows of data and I want to take data from another file and add Line 1 to the end of Line1 in the first file
file1 line1.........file2 line1
file1 line2.........file2 line2... (12 Replies)
Discussion started by: Kelam_Magnus
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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)