Thanks, jay. I was unaware of the paste command. I was man -k "append" but if I had used the keyword "merge" I would have found it. I'm still dissecting bakunin's explanation.
Hi I have used many times the various methods to append two lines together in a file.
This time I want to append the 1st line to the second and repeat for the complete file.... an example
This is the file
owns the big brown dog
joe
owns the small black dog
jim
What I want is
... (7 Replies)
I'll try explain this as best I can. Let me know if it is not clear.
I have large text files that contain data as such:
143593502 09-08-20 09:02:13 xxxxxxxxxxx xxxxxxxxxxx 09-08-20 09:02:11 N line 1 test
line 2 test
line 3 test
143593503 09-08-20 09:02:13... (3 Replies)
Hi,
I've spent some time researching for this but can't seem to find a solution. I have a file like this
1234|Test|20101111|18:00|19:00There will be multiple lines in the file with the same kind of format. For every line I need to make it this
1234|Test|20101111|18:00|19:00||create... (5 Replies)
Hello,
I have a group of text files with many lines in each file.
I need to delete all the lines in each and only leave 2 lines in each file. (3 Replies)
Hi,
I have 1000 line text file.
I need only the 1st and 8th line from every set of 10 lines, that is,
1,8,11,18,21,21,28,31,38,... lines etc into a text file.
Please let me know how I can achieve the same.
Regards,
Don (2 Replies)
Hi,
My file has the below content
Heading
1
2
3
Heading
4
5
6
I need to remove the other occurrences of first line and display other lines.
The content of first line is not static
My output should be:
Heading
1
2 (8 Replies)
Hi All,
This is very urgent, I've a data file with 1.7 millions rows in the file and the delimiter is cedilla and I need to format the data in such a way that if the NF in the next row is less than 1, it will append that value to previous line.
Any help will be appricated.
Thanks,... (17 Replies)
I have been searching and trying to come up with an awk that will perform the following on a
converted text file (original is a pdf).
1. Since the first two lines are (begin with) text they are removed
2. if $1 is a number then all text is merged (combined) into one line until the next... (3 Replies)
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)