10-07-2009
Last edited by Scott; 10-07-2009 at 07:50 AM..
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi,
I would like to create an IF statement where if a variable is equal to at least one of 2 (or more) values then the script proceeds. For example:
TEST_VAR=2
if ; then
echo success!
else
echo failure
fi
I understand that the above syntax is wrong but I feel it must be close. Any... (1 Reply)
Discussion started by: msb65
1 Replies
2. Shell Programming and Scripting
All,
My environment is Red Hat Enterprise Linux 5.
I am using the following condition --
if -0 ]
above command is not working. It is telling that -a unexpected.
Please help me (10 Replies)
Discussion started by: user7509
10 Replies
3. Shell Programming and Scripting
Hi ,
I have a peculiar problem.
i have an if block like this
if ;
then
echo " todays date is " ${date} >> log_file
echo " file count is " $ count >> log_file
mv filename1 filename 2
else
echo "no files available ">> log_file
fi
the echo statement "no files available " is not... (2 Replies)
Discussion started by: wizardofoz
2 Replies
4. Shell Programming and Scripting
Hi,
I'm using AIX(ksh shell).
> cat temp.txt
"a","b",0
"c",bc",0
"a1","b1",0
"cc","cb",1
"cc","b2",1
"bb","bc",2
I want the output as:
"a","b","c","bc","a1","b1"
"cc","cb","cc","b2"
"bb","bc"
I want to combine multiple lines into single line where third column is same.
Is... (1 Reply)
Discussion started by: samuelray
1 Replies
5. Shell Programming and Scripting
Hi All,
I am trying to check if two variables have value assigned to it.
i am doing it like
if ]
then
echo "Please specify either single hostname or host file for the report"
usage
exit
fi
But its not working for it.Even i specify values for both variables it dont go... (6 Replies)
Discussion started by: kailash19
6 Replies
6. Shell Programming and Scripting
Hello experts,
I'm stuck with this script for three days now. Here's what i need.
I need to split a large delimited (,) file into 2 files based on the value present in the last field.
Samp: Something.csv
bca,adc,asdf,123,12C
bca,adc,asdf,123,13C
def,adc,asdf,123,12A
I need this split... (6 Replies)
Discussion started by: shell_boy23
6 Replies
7. Shell Programming and Scripting
Hi,
I wanted to satisfy two requirements to proceed to do a task
One of them is to calculate between two metrics and the other to check one of the file not empty
if the condition matches the above two, it should proceed with the task
below is the snippet of it, however when i run the script... (3 Replies)
Discussion started by: ajothi
3 Replies
8. Shell Programming and Scripting
Hi guys,
I need to read following lines and put them in same row ….
text: Abcd5437_XYA0_B1_WXYZ_BE
99:00:14:42:55:01:d4:22
99:00:14:42:70:01:d4:22
99:00:14:42:55:03:a0:22
99:00:14:42:70:03:a0:22
... (4 Replies)
Discussion started by: dc@bos
4 Replies
9. Shell Programming and Scripting
I have an if condition. If that condition is true then one script will be run and after that I need to check another condition based on the output value of first script.
i tried like below :
cd lock
if ; then
rm exitup
if ; then
kb_shutdown
kb_startup
if ; then
rm exitup
if ;... (3 Replies)
Discussion started by: charanarjun
3 Replies
10. Shell Programming and Scripting
All,
I have a text file(Inputfile.csv) with millions of rows and 100 columns. Check the sample for 2 columns below.
Key,Check
A,1
A,2
A,
A,4
B,0
B,1
B,2
B,3
B,4
....
million rows.
My requirement is to delete all the rows corresponding to all the keys which ever has at least one... (4 Replies)
Discussion started by: ks_reddy
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)