Hi,
I need to write a shell script (ksh) to read contents starting at a specific location from one file and append the contents at specific location in another file. Please find below the contents of the source file that I need to read the contents from,
File 1
-----# more... (5 Replies)
Hi, I am a newb as far as shell scripting and SED goes so bear with me on this one.
I want to basically append to each line in a file a delimiter character and the line's line number e.g
Change the file from :-
aaaaaa
bbbbbb
cccccc
to:-
aaaaaa;1
bbbbbb;2
cccccc;3
I have worked... (4 Replies)
Hi,
I have a .properties file that a read in some values in an .sh file but everytime I put it out on the server it fails.
If I copy and paste the values of the .properties file on my local machine to the .properties file on the server it works just fine. Someone mentioned to see if it has
dos... (3 Replies)
Hello Guys
Please let me know how to solve the below issue
I have a file like below
drop table R1416.ABC1 cascade constraints;
drop table R1416.ABC2 cascade constraints;
drop table R1416.ABC3 cascade constraints;
drop table R1416.ABC4 cascade constraints;
drop table R1416.ABC5... (7 Replies)
Hello,
I have been browsing through the forum, but unable to find a solution for my requirement.
I need to go through a file and search for /home/users and insert a # symbol at the start /home/users. Example output is #/home/users.
Can you please help me with the awk or sed command for... (1 Reply)
I'm working on a personal project, a multiplication quiz script for my kids. In it, the user's performance will be recorded and written to a file. After they've played it a little while, it will start to focus more on the ones that give them the most trouble-- that take a long time to answer or... (4 Replies)
Here is my dir structure:
/tmp/dave/myappend.txt
/tmp/dave/dir1/test.txt
/tmp/dave/dir2/test.txt
/tmp/dave/dir3/test.txt
/tmp/dave/dir4/test.txt
I want to append the contents of myappend.txt to the end of each file with the name "test.txt" in all dirs in /tmp/dave/
I have tried this:... (2 Replies)
In the bash below I am trying to run the script entire script including the ....(which is a bunch of code) and then in the run function if the user response is y (line in bold). then start processing from execute function. Basically, goto the # extract folder for variable filename line and start... (4 Replies)
Hi there,
i've got a file with this content
$ cat file1
Matt
Mar
The other file has the same number of lines with this content:
$ cat file2
20404=767294
23450=32427
is there a way with either using sed, awk or paste to insert the content of file1 before the "=" character? So... (3 Replies)
Discussion started by: nms
3 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)
09-15-2011
