06-08-2012
Thank you. It's working well: it tells me precisely at which line the script stopped.
But how do you start reading from this very line though?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a file TXTPROCESS.TXT.20071129 in which line 1 contains the file name and rest of the records are data.
The file data looks like this:
TXTPROCESS.TXT.20071129
DIVD20071129
INTR20071129
BALN20071129
From line 2 onwards the first 4 characters defines individual process. What I... (2 Replies)
Discussion started by: skymirror
2 Replies
2. Shell Programming and Scripting
Hello, I need help in appending the line number of each line to the file and also to get the total number of lines. Can somebody please help me.
I have a file say:
abc
def
ccc
ddd
ffff
The output should be:
Instance1=abc
Instance2=def
Instance3=ccc
Instance4=ddd
Instance5=ffff
... (2 Replies)
Discussion started by: chiru_h
2 Replies
3. Shell Programming and Scripting
Hi,
I have a huge file & I want to add a specific text in column. But I want to add this text from a specific line number to a specific line number & another text in to another range of line numbers.
To be more specific: lets say my file has 1000 lines & 4 Columns. I want to add text "Hello"... (2 Replies)
Discussion started by: Ezy
2 Replies
4. Shell Programming and Scripting
Hi Everybody,
I am trying to write a script that will get some perticuler data from a file and redirect to a file.
My Question is,
I have a Very huge file,In that file I have my required data is started from 25th line and it will ends in 100th line.
I know the line numbers, I need to get all... (9 Replies)
Discussion started by: Anji
9 Replies
5. Shell Programming and Scripting
Hi Guys,
I am new to unix.
Actually i want help in writing an single command where
i can actually read specific line number in file where the line number will be passed to command as parameter.
ex.
1 a
2 b
3 c
4 d
And to my command i pass as 2.
so i should get output as 2 b
... (15 Replies)
Discussion started by: kam786sim
15 Replies
6. UNIX for Dummies Questions & Answers
Hello Everyone.
I am trying to display contains of a file from a specific line to a specific line(let say, from line number 3 to line number 5). For this I got the shell script as shown below:
if ; then
if ; then
tail +$1 $3 | head -n $2
else
... (5 Replies)
Discussion started by: grc
5 Replies
7. Shell Programming and Scripting
dear all,
i need your advice
i have sample script like this:
testing.sh
for i in {1..10}
do
echo testing $i
done
but i forgot create "#!/bin/bash" in above "for"
so i want output will like this
testing.sh
#!/bin/bash
for i in {1..10}
do
echo testing $i
done (2 Replies)
Discussion started by: zvtral
2 Replies
8. Shell Programming and Scripting
Hi all,
I have a file sample.txt
abc
asd
adf
daf
adw
add
adv
wdf
I want to control the number of lines to read
Like if i give input as ./script_name 2 5
required output
asd
adf
daf (2 Replies)
Discussion started by: krux_rap
2 Replies
9. Shell Programming and Scripting
Hi All,
I've a file like this..
Sheet1
a,1
a,2
a,3
a,4
a,5
Sheet2
a,6
a,7
a,8
a,9
a,10
Sheet3
a,11
a,12
a,13 (7 Replies)
Discussion started by: manab86
7 Replies
10. Shell Programming and Scripting
I am new to ksh scripts. I would like to be able to read a file line by line from a certain line number. I have a specific line number saved in a variable, say $lineNumber. How can I start reading the file from the line number saved in $lineNumber? Thanks! (4 Replies)
Discussion started by: dcowboys13
4 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)