08-01-2011
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
My intention was to build a dual boot XP Pro 64 and Ubuntu media server. I had installed the AMD64 version of Ubuntu 8.10 server and thought that I would be able to install Apache server. I need a GUI to work in. I tried to boot and install Mythbuntu 32 bit 8.10, but my machine now won't recognize... (0 Replies)
Discussion started by: docflyboy
0 Replies
2. Ubuntu
Hi all,
I am working on Ubuntu 7.10 and I want to install libssl-dev_0.9.8a-7ubuntu0.13_i386.deb. So tryied it with apt-get command but getting the following error--
Then I downloaded .deb file and attempt to install it with package installer but again unable to install it and getting the... (3 Replies)
Discussion started by: smartgupta
3 Replies
3. HP-UX
I have 2 servers , both are HP-UX
specifications as follows :
(1) HP-UX adroit B.10.20 A 9000/785 2013264127 one-user license
(2) HP-UX xen B.11.31 U ia64 2662515494 one-user license
First one has tcsh installed
adroit:/home/seo/hitendra 22 ] which tcsh
/usr/bin/tcsh
But the... (1 Reply)
Discussion started by: hiten.r.chauhan
1 Replies
4. Linux
Dear all,
I would like to install a new version of package without remove old version on Centos and vice versa.
Please give me advice!
thanks much, (2 Replies)
Discussion started by: all4cfa
2 Replies
5. UNIX for Dummies Questions & Answers
Hello,
i have downloaded an rpm package "hadoop-0.20.205.0-1.amd64.rpm"
in /usr/local/ directory.
I'm trying to install the rpm package in a new path/location (/usr/local/hadoop-0.20.205), but i can't.
I did:
1st try: Didn't work
sudo rpm -i --prefix=/usr/local/hadoop-0.20.205... (1 Reply)
Discussion started by: g_p
1 Replies
6. UNIX for Dummies Questions & Answers
Hello,
i try to install quilt package on ubuntu 10.10 :
apt-get install quilt
but i have this error:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package quilt is not available, but is referred to by another package.
This may mean... (1 Reply)
Discussion started by: chercheur857
1 Replies
7. UNIX for Dummies Questions & Answers
Stupid question of the day.
How can I find a file that is associated with a package installed on my Ubuntu 12.04 desktop. More clarification, so if I:
lsof -p 11399
java 11399 davider mem REG 8,6 438211 265067 /usr/lib/java/jre1.7.0_07/lib/i386/libt2k.so
How can I... (4 Replies)
Discussion started by: metallica1973
4 Replies
8. Ubuntu
Hi,
I want to upgrade a package to a specified version on Ubuntu, can you please shed some light?
I know we can do it with but jere i want to upgrade the package to a specified version.
Can someone please assist?
Thanks (1 Reply)
Discussion started by: prash358
1 Replies
9. Ubuntu
I need to re-install ubuntu on a system with ubuntu 14.04 already installed. I have the cd but can not seem to boot from it or find the installer. Is there a way to re-install from the command line or how do I do a fresh re-install? Thank you :)
---------- Post updated at 10:13 AM... (2 Replies)
Discussion started by: cmccabe
2 Replies
10. UNIX for Beginners Questions & Answers
Hello, I'm running Ubuntu 18.04 and I would like to install libboost-python version 1.46. Currently I have installed version 1.65:
wakatana@local-machine:~$ dpkg -l | grep libboost-python
ii libboost-python-dev 1.65.1.0ubuntu1 amd64 ... (1 Reply)
Discussion started by: wakatana
1 Replies
LEARN ABOUT DEBIAN
devel::refcount
Devel::Refcount(3pm) User Contributed Perl Documentation Devel::Refcount(3pm)
NAME
"Devel::Refcount" - obtain the REFCNT value of a referent
SYNOPSIS
use Devel::Refcount qw( refcount );
my $anon = [];
print "Anon ARRAY $anon has " . refcount($anon) . " reference
";
my $otherref = $anon;
print "Anon ARRAY $anon now has " . refcount($anon) . " references
";
DESCRIPTION
This module provides a single function which obtains the reference count of the object being pointed to by the passed reference value.
FUNCTIONS
$count = refcount($ref)
Returns the reference count of the object being pointed to by $ref.
COMPARISON WITH SvREFCNT
This function differs from "Devel::Peek::SvREFCNT" in that SvREFCNT() gives the reference count of the SV object itself that it is passed,
whereas refcount() gives the count of the object being pointed to. This allows it to give the count of any referent (i.e. ARRAY, HASH,
CODE, GLOB and Regexp types) as well.
Consider the following example program:
use Devel::Peek qw( SvREFCNT );
use Devel::Refcount qw( refcount );
sub printcount
{
my $name = shift;
printf "%30s has SvREFCNT=%d, refcount=%d
",
$name, SvREFCNT($_[0]), refcount($_[0]);
}
my $var = [];
printcount 'Initially, $var', $var;
my $othervar = $var;
printcount 'Before CODE ref, $var', $var;
printcount '$othervar', $othervar;
my $code = sub { undef $var };
printcount 'After CODE ref, $var', $var;
printcount '$othervar', $othervar;
This produces the output
Initially, $var has SvREFCNT=1, refcount=1
Before CODE ref, $var has SvREFCNT=1, refcount=2
$othervar has SvREFCNT=1, refcount=2
After CODE ref, $var has SvREFCNT=2, refcount=2
$othervar has SvREFCNT=1, refcount=2
Here, we see that SvREFCNT() counts the number of references to the SV object passed in as the scalar value - the $var or $othervar
respectively, whereas refcount() counts the number of reference values that point to the referent object - the anonymous ARRAY in this
case.
Before the CODE reference is constructed, both $var and $othervar have SvREFCNT() of 1, as they exist only in the current lexical pad. The
anonymous ARRAY has a refcount() of 2, because both $var and $othervar store a reference to it.
After the CODE reference is constructed, the $var variable now has an SvREFCNT() of 2, because it also appears in the lexical pad for the
new anonymous CODE block.
PURE-PERL FALLBACK
An XS implementation of this function is provided, and is used by default. If the XS library cannot be loaded, a fallback implementation in
pure perl using the "B" module is used instead. This will behave identically, but is much slower.
Rate pp xs
pp 225985/s -- -66%
xs 669570/s 196% --
SEE ALSO
o Test::Refcount - assert reference counts on objects
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2011-11-15 Devel::Refcount(3pm)