Hi all,
A friend of mine accidently erased all crontab entries by typing crontab -r.
Can anyone pls. help me on this.
Is it possible that a backup file is available other than files from the backup tape. Or is it retrievable ???
Thnx,
MK (6 Replies)
Hi!
I'm a bit noob on Unix/Linux world, so sorry any lame question i may make...
Oh.. and my english too.. is not so famous lol..
The deal is to use crontab to change my admin password every weak to something like "mypasswordcurrrentday" that is... i want evey weak to change my password but... (2 Replies)
Hey guys
Just need some help with crontab.Iam looking for a script that will alert particular user about its change through sendmail.We are using bash here.
--CoolKid (3 Replies)
Hi Friends,
I need to change crontab entries in prod.
$crontab -l -> using this i can see the entries only
Plese tell me how to edit this crontab and how to change the entires
Waiting for ......
Thanks In advance friends
Krish. (2 Replies)
hi guys. can someone tell me what will happen if there are two identical crontab entry for an application. For example
03 23 * * 1 /usr/vt/crondemo
03 23 * * 1 /usr/vt/crondemo
will the file crondemo run twice, once or wont run at all?? (2 Replies)
Hi All,
I have scheduled a script to run every five minutes through crontab. If there is any issue with the script which may need manual intervention, I have used the mailx commands. But at the same time, I would want the cron to be disabled until the issue is resolved. Once things are fine,... (2 Replies)
Hi friends,
Actually i wrote many scripts in korn shell for time saving activity in storage domain. But every week i am spending some time for the running of script. So every Monday i wants to run my scripts automatically. So corn will be helpful according to my friend's opinion.
But I don't... (5 Replies)
I have created a shell script "abcd.sh" and script should run after every 10 min., For that I will create below entry in the crontab file by using command crontab -e
*/10 * * * * /cdr/work/proc_raw/abcd.sh >> /dev/null 2>&1
I wish to know whether above entry is correct or I have to make entry... (2 Replies)
Hi,
We are currently running AIX 6.1 TL4. There are around 30 ksh scripts that are ran from crontab which if an error occurs or a problem with an ftp unix sends the out of the ksh script which goest to our console via the local user hci which is viewed by the mail command. I've tired adding... (2 Replies)
Hi,
1. How can I list all the crontab entries of all system users (like root, adm, sys etc.) as we have multiple files like /etc/crontab , /var/spool/cron, /etc/cron.d, /etc/cron.daily, /etc/cron.hourly, /etc/cron.monthly etc.
2. How can I list all the crontab entries of ALL users on a... (1 Reply)
Discussion started by: prvnrk
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)