how to use the arrow keys in shell scripting. is there any special synatax / command for this.
i just want to use the arrow keys for navigation.
replies appreciated
raguram R (3 Replies)
Firstly, i apologise if i have posted in a wrong section of the forum. Please let me know which is the correct section my post should go to.
I have to SCP a file from one server(server A) to another (server B). I read around that a secure way is to use public and private keys.
Assuming my... (2 Replies)
Hello,
I have an issue with an outside party trying to deliver a file to our server via SFTP.
I have setup the .ssh directory under the home directory for the user account that is being used and setup the authorized_keys file with correct permissons etc for .ssh directory and file.
We... (2 Replies)
HI,
I'm trying to create SSH public/private keys using following command.
hp023:/users/vikram> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/users/vikram/.ssh/id_rsa): rsa
Enter passphrase (empty for no passphrase):
Enter same passphrase... (9 Replies)
Where in the world are the ssh private keys stored on the home server? I know the public keys are renamed to authorized_keys under the /export/home//.ssh directory on the remote server. (1 Reply)
Hello,
I just installed a bran new Centos 6.2 including openssh 5.3.
On older servers I installed older Linux including openssh 4.3,
I am using keygen with private/public keys to log root on all servers (in a LAN) without typing password each time.
To do this, of course, I have my local... (4 Replies)
Hi all,
I needed a shell script for file transfering using public/private keys for authentication.
Could you please help me out on this?
A procedure to write a shell script is enough.
Thanks in advance.
Regards.
Vidya N (8 Replies)
Hi All,
I have a query....say on server A, I have generated the Private and Public keys and shared the public key with server B.
Now i can surelyconnect(without password) from server A to server B.....
but can i similarly connect from server B to server A as well
Regards (1 Reply)
hi guys , i have few files i have to do sftp, the public and private key work like a magic , no problem at all
the syntax is as below
sftp -0 identityfile=~/ure/blsl/loc2/.ssh/id_rsa_ssh1 ssh1@remote >log_dir/file.timestamp<<end
lcd folder
cd folder
put *
quit
end
================
my... (3 Replies)
FILE_ID extraction from file name and save it in CSV file after looping through each folders
My files are located in UNIX Server, i want to extract file_id and file_name from each file .and save it in a CSV file. How do I do that?
I have folders in unix environment, directory structure is... (15 Replies)
Discussion started by: princetd001
15 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)