When I log into bash it will say my username @localhost I wondering how do I change localhost to another such as draco.I've the using the hostname command as root but it changes back to localhost after I reboot.I was wondering how would I hide my ISP hostname in linux.Because when I log into an IRC... (1 Reply)
I have a linksys DSL router.
I run a mixed environment of Windows, Linux and Solaris. The routers dhcp tables show the windows machines hostnames and associated IP's ok but the unix bases mahines don't have associated hostnames in the DHCP tables. I can ping by IP but not my the machines... (5 Replies)
Hi Friends,
I have a list of servers with their production names in a file.
I want to know the best way eiter a command or a script that can do the following :-
Append "-bkp" to each hostnames at the end
And run nslookup and make sure I have valid backup IP add assigned to it.
Any... (1 Reply)
Hi
I have a file containing hostnames like this
(host=myhost.domain.com) or
(host=myhost)
i need to extarct the unique hostnames without the domain names from that file.
so my output should be myhost (without domain names)
But my regex skills are rusty
i tried grep "host"... (4 Replies)
Hi all,
i have a list of files that contains some PC hostname, then i need to enumerate every hostname and check if there's a table with same name of the hosts in MySQL database XYZ.
I need this because have to decide automatically if i have to make a create table or a insert into an existent... (2 Replies)
I am trying to determine if there are several url/host names for an IP address. Is there a UNIX command to find ALL host names for an IP address?
Thank you in advance. (3 Replies)
I need to obtain a list of all the hostname of all the VM's that reside on two ESXI servers using pysphere. I have attempted using the basic methods but an unable to get a hostname in my testing using:
from pysphere import VIServer
server = VIServer()
... (0 Replies)
As the title suggests, I'm wondering if its possible to set a hostname to a name or word with Cyrillic letters (e.g. - Like the Russian alphabet). I tried installing the cyrillic-console package in Debian. I switched my desktop to Russian as well. However, when I try to set the hostname I get that... (2 Replies)
i have a file which has 100 servers,i want a script which can output me ip address and hostname for that server.
Thanks in advance!!
input file
abc.com
output file should be
abc.com 192.168.1..1 (1 Reply)
Hello,
I am trying to develop a script to check for valid hostnames. Below are the prerequisites for a valid hostname which I got from wiki :
Hostnames are composed of series of labels concatenated with dots, as are all domain names. For example, "en.wikipedia.org" is a hostname. Each label... (8 Replies)
Discussion started by: rahul2662
8 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)