03-11-2014
What have you tried so far and what was the problem?
bakunin
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi Everyone,
1.txt
00:00:00 0 0 0 0 0 0 0
00:00:01 0 0 0 2 1 33 2
00:00:02 5 0 0 0 0 0 0
00:00:03 0 4 0 0 0 0 0... (5 Replies)
Discussion started by: jimmy_y
5 Replies
2. Shell Programming and Scripting
Hi I have search everywhere for this but I haven't got any result. so here is my question?
I am trying to ask user to enter a name and then searching that name from a file and from a specific column. If user enter something, it should only displaying that name from that specific column and If the... (3 Replies)
Discussion started by: sillyha
3 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I have two files. file1 contents:
aaa bbb ccc ddd
eee fff ggg ddd
www eee ggg dde
qqq zzz hhh ddd
file2 contents:
mmm
mmm
mmm
mmm
Now I want to add file2 contents to end of lines in file1 where a line contains pattern "ddd" and it should look like this:
file3 contents:
aaa... (3 Replies)
Discussion started by: harjitsingh
3 Replies
4. Shell Programming and Scripting
i have a file which has a column that is unique
i am intending to serach it and if it is there to remove the row.
the file looks like
ROLLNO,NAME ,SUB1,SUB2,SUB3,TOTAL,PERCENTAGE,RESULT
15 ,rig ,34 ,56 ,87 ,177 ,59 % ,PASS
23 ,wel ,45 ,76 ,56 ,177 ,59 % ... (0 Replies)
Discussion started by: gotam
0 Replies
5. Shell Programming and Scripting
Scottn, m really sorry but i have not got my answer yet.
my concern is how to delete the row !!!
i have a file which has a column that is unique
i am intending to serach it and if it is there to remove the row.
the file looks like
ROLLNO,NAME ,SUB1,SUB2,SUB3,TOTAL,PERCENTAGE,RESULT... (9 Replies)
Discussion started by: gotam
9 Replies
6. Shell Programming and Scripting
How to search for a word like "computer" in a column (eg: 4th field) of a '***' delimited file and add a column at the end of the record which denotes 'Y' if present and 'N' if not. After this, we need to again check for words like 'Dell' but not 'DellXPS' in 5th field and again add another column... (5 Replies)
Discussion started by: Jassz
5 Replies
7. Shell Programming and Scripting
Summary:
I planned on using Awk to grab a value from File 1 and search all records/fields in file 2. If there is a match in File 2, print the first column value of the record of the match of File2. Continue this search until the end of file 2. Once at the end of file 2, grab the next value in... (4 Replies)
Discussion started by: Incog
4 Replies
8. Shell Programming and Scripting
Hi all,
I have 2 files, the first one containing a list of ids and the second one is a master file. I want to search each id from the first file from the 5th col in the second file. The 5th column in master file has values separated by ';', if not a single value is present.
Each id must occur... (2 Replies)
Discussion started by: ritakadm
2 Replies
9. Shell Programming and Scripting
I wanted to search for a string and replace it with other string from nth column of a file which is comma seperated which I am able to do with below
# For Comma seperated file without quotes
awk 'BEGIN{OFS=FS=","}$"'"$ColumnNo"'"=="'"$PPK"'"{$"'"$ColumnNo"'"="'"$NPK"'"}{print}' ${FileName} ... (5 Replies)
Discussion started by: Amit Joshi
5 Replies
10. UNIX for Beginners Questions & Answers
i have a file having 5 columns with more than million records. And i want to search using UNIX command to find if there are any spaces in 5th column. any please help. (1 Reply)
Discussion started by: sivakumar.p
1 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)