05-28-2013
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
hi all,
I have a text file with following content
PAGENUMBER
asasasa
asasasa
PAGENUMBER
sasasasasa
PAGENUMBER
using sed i want to replace PAGENUMBER by occurrence count
eg
1
asasasa
asasasa
2
sasasasasa
3 (4 Replies)
Discussion started by: uttamhoode
4 Replies
2. Shell Programming and Scripting
Hi, I am totally new to shell scripting.
I have a String "c:\working\html\index.txt.12-12-2009.bkp" I want to check if the string has more than one "." character. If it does I would like to retrieve only "c:\working\html\index.txt" i.e, discard the second occurrence of "." and the rest of the... (7 Replies)
Discussion started by: imr
7 Replies
3. Shell Programming and Scripting
Hello!
Please bare with me, I'm a total newbie to scripting. Here's the sudo code of what I'm trying to do:
Get file name
Does file exist?
If true
get length of file name
get network id (this will be the last 3 numbers of the file name)
loop x 2
If... (1 Reply)
Discussion started by: KatieV
1 Replies
4. Shell Programming and Scripting
Hello Folks..
I need your help ..
here the example of my problem..i know its easy..i don't all the commands in unix to do this especiallly sed...here my string..
dwc2_dfg_ajja_dfhhj_vw_dec2_dfgh_dwq
desired output is..
dwc2_dfg_ajja_dfhhj
it's a simple task with tail... (5 Replies)
Discussion started by: victor369
5 Replies
5. Shell Programming and Scripting
I have a file (test.dat) which contains data like this
459|199811047|a |b |shan
kar|ooty|
460|199811047|a |bv |gur
u|cbe|
but I need it like:
459|199811047|a |b |shankar|ooty|
460|199811047|a |b |guru|cbe|
While reading the data from this file, I don't want to remove newline from the end of... (4 Replies)
Discussion started by: jcrshankar
4 Replies
6. Shell Programming and Scripting
Ok,
So I have a huge file that has over 12000 lines in it.
in this file, there are 589 occurrences of the string "use five-minute-interval" spread in various areas in the file.
How can i replace the the last 250 of the occurrences of "use five-minute-interval" with "use... (10 Replies)
Discussion started by: SkySmart
10 Replies
7. Shell Programming and Scripting
How can i remove the first and last character of strings like below:
"^^^613*"
"admt130"
"^^^613*"
"123456"
"adg8484"
"DQitYV09dh1C"
Means i wanna remove the quotes("").
Please help (17 Replies)
Discussion started by: proactiveaditya
17 Replies
8. Shell Programming and Scripting
Hello
how to find last occurence of a string
for example in the following I want last occurence of '-' i.e. position 12
str="aa-bbb-cccc-ddd-ee"
my pupose is to get the string 'ee'
Thanks and Regards
Chetanz (5 Replies)
Discussion started by: Chetanz
5 Replies
9. Shell Programming and Scripting
Hi,
I would like to know how, using sed, be able to insert contents of file2 in file1 after say the second occurrence of a given string? e.g.
> cat file1
banana
apple
orange
apple
banana
pear
tangerine
apple
> cat file2
I don't like apples
What would be the sed command to insert... (5 Replies)
Discussion started by: dimocn
5 Replies
10. Shell Programming and Scripting
Hi,
Anyone can help using SED searches a character string for a specified delimiter character, and returns a leading or trailing space/blank.
Text file :
"1"|"ExternalClassDEA519CF5"|"Art1"
"2"|"ExternalClass563EA516C"|"Art3"
"3"|"ExternalClass305ED16B8"|"Art9"
...
...
... (2 Replies)
Discussion started by: fspalero
2 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)