10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
This basic code works.
I have a very long list, almost 10000 lines that I am building into the array. Each line has either 2 or 3 fields as shown in the code snippit. The array elements are static (for a few reasons that out of scope of this question) the list has to be "built in".
It... (5 Replies)
Discussion started by: sumguy
5 Replies
2. Shell Programming and Scripting
Hi ,
I have been trying to write a perl script to do this job. But i am not able to achieve the desired result. Below is my code.
my $current_value=12345;
my @users=("bob","ben","tom","harry");
open DBLIST,"<","/var/tmp/DBinfo";
my @input = <DBLIST>;
foreach (@users)
{
my... (11 Replies)
Discussion started by: chidori
11 Replies
3. Shell Programming and Scripting
I have an array and two variables as below,
I need to check if $datevar is present in $filename.
If so, i need to replace $filename with the values in the array.
I need the output inside an ARRAY
How can this be done.
Any help will be appreciated. Thanks in advance. (2 Replies)
Discussion started by: irudayaraj
2 Replies
4. Shell Programming and Scripting
Hi everyone
I have one question about using array in perl. let say I have several log file in one folder.. example
test1.log
test2.log
test3.log
and the list goes on..
how to make an array for this file? It suppose to detect log file in the current directory and all the log file will... (3 Replies)
Discussion started by: sayachop
3 Replies
5. Shell Programming and Scripting
Hi Everyone,
($total+=$_) for @record;
assume @record=(1,2,3), so the result is 6.
if @record=("1 3","2 3","3 3"), would like to sum up the 2nd field of this array, the result is 9.
i tried " ($total+=$) for @record ", cannot, please advice.
Thanks
---------- Post updated at 03:45... (1 Reply)
Discussion started by: jimmy_y
1 Replies
6. Shell Programming and Scripting
Hi Everyone,
Any simple code can simplify the code below, please advice. Thanks
# cat 2.pl
#!/usr/bin/perl
use warnings;
use strict;
my @aaaaa = <DATA>;
my @uids;
foreach (@aaaaa) {
my @ccccc = split (",", $_);
push @uids, $ccccc;... (3 Replies)
Discussion started by: jimmy_y
3 Replies
7. Shell Programming and Scripting
I'm trying to take the output of an environment that has multiple strings
ex.
# echo $SSH_CLIENT
192.168.1.1 57039 22
I need that IP... so I can set it to another environment.
Thank you (3 Replies)
Discussion started by: adelsin
3 Replies
8. Shell Programming and Scripting
Hi,
Is there any way I can grep an array against another array?
Basically here's what I need to do.
There will be an array containing some fixed texts and I have to check whether some files contain these lines. Reading the same files over and over again for each different pattern doesnt seem... (1 Reply)
Discussion started by: King Nothing
1 Replies
9. Shell Programming and Scripting
I am using a seed file shown below to separate cisco devices by ios/os type. I want to bunch all the devices based on ios/os version. Once I find a match, I only want to push the ip address into the appropriate array.
Example of seedfile
8 host1 (C3500XL-C3H2S-M) 11.0(5)WC17 10.1.44.21
9... (1 Reply)
Discussion started by: popeye
1 Replies
10. Shell Programming and Scripting
normally when i type:
condor_q | tail -1
command line returns:
0 jobs; 0 idle, 0 running, 0 held
I want use the number in front of 'running' in a series of equality tests to submit more jobs when my queue gets low. Someone showed me how to do it a few days ago by setting an array equal to... (4 Replies)
Discussion started by: pattywac
4 Replies
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)