Can anyone tell me if the copy command in PERL has the same functionality as in KSH shell in UNIX or does it actually move the file ??
$cp_stat=system("cp $ENV{OLAMEBSDIR}/data/olam.ddabal$type $ENV{OLAMDIR}/balance/data/olam.ddabal$type.$HeaderDate"); (1 Reply)
I am new to perl. I have adopted some perl scripts that seem not to work 100%. I 've corrected such things as file sharing contention etc.
What these perl scripts basically do is extract specific records for statistical reporting of authentication and authorization from syslog daemon local... (5 Replies)
If I use 2 system commands in a script, will one finish before the next one starts? or will it start the first and the second at the same time?
i.e.
system("ps | grep rminer");
system("ls -al | grep 431"); (1 Reply)
I have created some DTS packages in SQL server 2000. The packages map input .dbf files to corresponding tables in the database. When I try to run the
package through Command prompt, it runs successfully and loads the data into tables. However same package when ran through perl gives different... (1 Reply)
In my code, I know I can write...
if ( defined &test_sub ) {
test_sub();
} else {
print "Subroutine doesn't exist";
}
This tests the existence of the test_sub subroutine without actually calling it.
If, though, I replace test_sub with a package method...
if ( defined... (1 Reply)
Hi
I am new to PERL and need to add a line to the perl script which issues a system call if certain pattern exists in the file, for example:
$system "my_command" if "my_pattern" exists in "my file"
Can somebody help me with the syntax? Thanks (4 Replies)
Hello everyone,
We have got a Server say Testserver with AIX 6.1 running on it.
We want to create user defined authorization for syslogd, ntpd and named . We don't want to use pre-defined authorization (aix.network.daemon). Is it possible to create an independent authorization for commands?... (1 Reply)
Hi All,
I am new to Perl and got a real stupid question. We are trying to install the Date:Calc package for some calculations with dates.The security guys mentioned they won't install it as root in /usr/bin/perl but have asked us to install it in any directory and use it from there.
Here's the... (2 Replies)
Hi, guys,
The content of file is below (from <UNIX® Shells by Example Fourth Edition>):
My code is below:
gawk -F'' ' { OFS = "****"; $3 = "(904)"; $8 = $5 + $6 + $7; print } ' lab3.data
The result is below:
So, where is the $1? Why is the variable $8 located at the wired position? (3 Replies)
Hello All,
I am writing the below script where it will connect to database and returns the results.
#!/sw/gcm/perl510/bin/perl
use SybaseC;
&openConnection;
&loadvalues;
sub openConnection {
$dbproc = new SybaseC(SYDB}, $ENV{DBDFLTUSR}, $ENV{DBDFLTPWD});
if... (2 Replies)
Discussion started by: filter
2 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)