10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I wish to know if there is any limitation in using unix commands in perl script or it is just we should avoid using them in our perl script.
For e.g Below is the command to get the recent file in a dir.:
$lcsvFile = `cd "$l_inputfilepath";ls -1t *.CSV|tail -1`
Is there any harm in coding... (1 Reply)
Discussion started by: Devesh5683
1 Replies
2. Shell Programming and Scripting
Hi all,
When I put the Perl command in a script, I got error.
system("perl -pi -e 's@words@words@g' myFile");
The error is:
Unrecognized character \x8A; marked by <-- HERE after دت مد�<-- HERE near column 15 at -e line 1.
Thanks in advance.
---------- Post updated at 06:30 AM... (0 Replies)
Discussion started by: Lham
0 Replies
3. UNIX for Dummies Questions & Answers
I am working in perl.
I need to do some svn check in from my server.
I need to install svn in my server.
I have the package "svn" in my server path
How can I install that in my server.
I tried ,
but this doesnt work. Can you please help with the command to be used.
Thanks in... (0 Replies)
Discussion started by: irudayaraj
0 Replies
4. Shell Programming and Scripting
Am trying to lean perl scripting in Unix OS to automate my tasks.
Please find the below perl script i have tried
#!/usr/bin/perl -w
print "Please Enter the VG name to be checked:";
$A = <>;
print "Please Enter the free size to be checked in GB:";
$B = <>;
$vgcheck = `vgdisplay... (7 Replies)
Discussion started by: jayachandran87
7 Replies
5. Shell Programming and Scripting
so in unix this command works works and shows me a list of directories
find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt
but when i try running a perl script to run this command
my $query = 'find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt';... (2 Replies)
Discussion started by: kpddong
2 Replies
6. Shell Programming and Scripting
Hello,
I have a PERL-TK based GUI from which I want to launch a command on an existing UNIX terminal (this is also the parent terminal for this perl based gui window). The command I want to launch is interactive (there is no intention to interact with that command from the same PERL gui i.e. no... (2 Replies)
Discussion started by: AnuragJindal
2 Replies
7. Shell Programming and Scripting
Hi there I have a list of mac addresses that are in this format
0100237D2136XX
0118A905599EXX
0118A9054E15XX
010003BAF1F3XX
0118A905599EXX
0100237D6522XX
010C53BAF1F3XX
010003BAF1F3XX
010C53BAF1F3XX
The 01 is at the beginning has been put on by my software, but the rest is the mac... (0 Replies)
Discussion started by: rethink
0 Replies
8. Shell Programming and Scripting
Net::SSH::Perl ...... how to print the output in a proper format
my $cmd = "ls -l";
my $ssh = Net::SSH::Perl->new($host);
$ssh->login($user, $pass);
my($stdout, $stderr, $exit) = $ssh->cmd("$cmd");
print $stdout;
the script works fine, but i am unable to see the output... (2 Replies)
Discussion started by: gsprasanna
2 Replies
9. Shell Programming and Scripting
Hi,
I have a perl script. It needs to open a file but the file that it will open will depend on the result of a unix command "tail -1". How can I do that in perl, to open a file which is the results from a unix command? Thanks in advance! Hope you can help me. (2 Replies)
Discussion started by: ayhanne
2 Replies
10. Shell Programming and Scripting
Hi
Is there any way to use UNIX and Perl to automate sending e-mail. I got a dynamic changing file that send out to people in my mailing list and want to experinment to see if Perl and UNIX can send it out for me when the content is change. I found a Perl source code but dont really know how to... (4 Replies)
Discussion started by: jy2728
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)