Dear All,
I have a file called football where i have a list of 11 players each on different lines.
I wish to add a name of another player on the first line.
I have created a file called footballscript in vi writing the following sed command to achieve this ...
cat football | sed -e '1 i\... (4 Replies)
I'm sure you guys have answered this elsewhere but I can't seem to find where so here goes.
#!/bin/bash
n=120
a=$(sed '120q;d' energy.xvg)
while ;do
a=$(sed $n'q;d' energy.xvg)
echo "$a \n" > newfile
n=$(($n+100))
done
exit 0
that script should read the file energy.xvg, start at... (1 Reply)
Hi,
I have two files XXX.dat and YYY.dat and their contents are as follows.
The contents of XXX.dat(The line numbers are just for reference)
1) Mango
2) Banana
3) Papaya
4) Apple
5) Pomegranate
The contents of YYY.dat
1) Custard apple
2) Grape
3) ... (4 Replies)
I have posted it previously but somehow could not delete the previous post.I felt i could not explain the problem statement well.
Here t goes.I have a file say File1. Now i need a specific pattern from the lines to be added to the other line.
File:
red blue green ABC.txt@ABC END
black... (1 Reply)
this is utterly embarassing :(
after posting here i revisited my files and found that when i used "vi" instead of a gui based editor, i suddenly found that the indentations were in fact wrong :(
sorry about this :( (0 Replies)
Hi,
I have this line:
ip=111.222.133.144,mac=00:16:3E:2A:08:3C,vifname=veth360','ip=10.2.3.4,vifname=veth360a'
^
|
-------
I want to insert this IP 144.133.222.111 between "144"... (4 Replies)
I use zentyal for my server admin, which is great but zentyal auto-generates config file on boot and hence overwrites any changes made directly to config files. In order to allow multiple user access to a MS ACCESS database, I need to customise the smb.conf file and add the following line to the... (9 Replies)
Hello All,
I have following file contents
cat file
#line=aaaaaa
#line=bbbbbb
#line=cccccc
#line=dddddd
line=eeeeee
#comment=11111
#comment=22222
#comment=33333
#comment=44444
comment=55555
Testing script
Good Luck!
I would like to comment line line=eeeeee and insert a new line... (19 Replies)
Hi,
consider a file called mobile.txt as follows:
For type lovers, add a new line at the end of it by copying its previous line and add a +1 to the field1, field2
Additionally, there are only 3 plans available to lovers type, so it should not work for lovers type already having 3 lines under... (11 Replies)
Hi
This is my first post and I'm just a beginner. So please be nice to me.
I have a couple of html files where a pattern beginning with "http://www.site.com" and ending with "/resource.dat" is present on every 241st line. How do I extract this to a new text file?
I have tried sed -n 241,241p... (13 Replies)
Discussion started by: dejavo
13 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)