It's time to learn what the special IFS variable does It's a list of characters that the shell splits on, by default any whitespace.
Code:
echo "Type the Container ID for every container that you want subnets exported"
echo "for (with comma between each one, for example... 1,45,98)"
echo -n "if you want every one listed, then just type ALL in caps and press [ENTER]: "
read containerid
OLDIFS="$IFS" # Save the default for later
IFS="," # This alters what variables split upon.
for X in $containerid # Usually, would split on spaces, but now splits on ,
do
echo "containerid $x"
done
IFS="$OLDIFS" # Put it back, or things won't split normally later
If you had your users type in 1 2 3 instead of commas, you wouldn't need to alter IFS at all.
Hi,
Newbie here. I have a file that consists of data that I want to convert to a csv file. For example:
Jul 20 2008 1111 / visit home / BlackBerry8830/4.2.2 Profile/MIDP-2.0 Configuration/CLOC-1.1 VendorID/105
Jul 21 2008 22222 / add friend / BlackBerry8830/4.2.2 Profile/MIDP-2.0... (3 Replies)
Hi,
Can any one tell me how to replace one or more tabs from start of the line and in between the words with commas in the file using unix commands?
My actual data in the text file is as below with spaces.The spaces are not being shown in the post..please see them while replying to the post.... (1 Reply)
Hello all
i am working on a database to import log files from my systems, but i cannot seem to find the answer. I searched here for a good bit and couldnt peice together what i was looking for.
I know you could do this with awk, i just dont know how. Any help would be greatly appreciated.... (6 Replies)
OK, I am one needy dude. However, how can I make the program NOT change any of the values BETWEEN the first and second "," ?
I dont want any of the numbers changed that are preceded by "AT".
I want ALL other numeric values > 300 changed to 300.
cat qin.csv |head... (4 Replies)
Hi All,
My file looks like this:
1 2 3
3 4 5
6 7 8
8 7 6
3 4 5
3 6 7
3 4 5
1 2 4
3 4 6
2 4 6
As you can see there are two newlines after the next pattern of numbers begin. (4 Replies)
Hi All,
I have a file which looks like this:
abc 3456
computer 3214
printer 0.9823
computer 3214
Can anyone please let me know how I can format my text like this?
abc 3456 computer 3214 printer 0.9823 computer 3214
I know how to space to newlines using tr but don't know how to do... (4 Replies)
Hey guys,
I have the following text:
1,2,3,4,5,6,'NULL','when',NULL,1,2,0,'NULL'
1,2,3,4,5,6,'NULL','what','NULL',1,2,0,1
I need the same text with the word NULL without commas
u know something like this:
1,2,3,4,5,6,NULL,'when',NULL,1,2,0,NULL
1,2,3,4,5,6,NULL,'what','NULL',1,2,0,1
... (1 Reply)
Hello experts,
I need to validate a csv file which contains data like this:
Sample.csv
"ABCD","I",23,0,9,,"23/12/2012","OK","Street,State, 91135",0
"ABCD","I",23,0,9,,"23/12/2012","OK","Street,State, 91135",0
I just need to check if all the records contain exactly the number of... (5 Replies)
Hi,
My input file is like this
chr1 + "NM_1234"
chr1 - "NM_1234"
If I want my third column to contain both the first and second column values, how do I do it?
I know how to do it by including the column numbers, but I want the values before the inverted commas.
So, my output would... (5 Replies)
Hi buddy's
my file are like this:
s.no,name,band,sal
1,"suneel",,10
2,"bargav
sand",,20
30,"
ebdug gil",,4
but i want
s.no,name,band,sal
1,"suneel",,10
2,"bargav sand",,20
30,"ebdug gil",,4
any command or Shell script for this.
please help me it's urgent to implement (33 Replies)
Discussion started by: Suneelbabu.etl
33 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)
05-18-2012
It's a list of characters that the shell splits on, by default any whitespace.