Boot the machine in maintenance mode by appending below in the grub entry for the kernel parameters
Mount the root filesystem as r+w (if /etc is a different filesystem, you need to mount it r+w too)
Run the passwd command and reset root's password
Reboot the machine and check
This is just the preliminary troubleshooting step. If this does not work, need to check if other users (except root) are getting the same error message or not, which might tell us if it's a PAM issue. Also, you could look into /var/log/secure file to see what exactly is getting denied.
Hi,
While I am trying SFTP my machine to another unix machine ,
it was working fine till 10 min back.
But now i am getting the below error
"Request for subsystem 'sftp' failed on channel 0"
Could you please someone help me to solve or analyise the root cause...
Cheers:b:,
Mahiban (0 Replies)
Hey since this morning I(nonrrot user) am not able to log into my system with my username. I am using redhat linux kernel release 2.6.9-5.ELsmp. I aslo found the folowing output for chkconfig command:
# chkconfig --list|grep ldap
ldap 0: off 1: off 2: off 3: off 4: off 5: off... (5 Replies)
Hi,
i got the following error when i tried to access the cygwin x server from a windows XP PC.
"xdmcp fatal error session failed session 23 failed for display"
Alternatively, when i tried to access the same Cygwin X Server from another windows XP PC which is on a different LAN... (3 Replies)
For some reason i cannot login using root or other accounts on my Linux system.
When logging in at the main console it says "Authentication failed" in a dialog box with an OK button.
The Linux system is Redhat 4.7.
I've already checked /etc/pam.d/login, /etc/security/access.conf and ... (27 Replies)
Hi everyone ...
( Linux Cent OS ) i cant login as root user in my lab machine ... i did give correct root and root passwd ..but it showing Authentication Failed ...
plz help me (0 Replies)
Hello everyone,
I'm setting up a cluster with 2 nodes using Red Hat enterprise 6.2 x86_64, 1 luci and 1 ricci for education purpose.
Ricci is installed and already running and luci is installed and running but at the time of add and create the cluster through the web gui it give me a error... (1 Reply)
I have two servers with a fresh install of Solaris 11, and having problems when doing rpcinfo between them. There is no firewall involved, so everything should theoretically be getting through. Does anyone have any ideas? I did a lot of Google searches, and haven't found a working solution yet.
... (2 Replies)
Hello all,
I recently updated PAM policy files (pam_authz.policy) on HP-UX Servers with AD groups involving allowing and denying the certain groups..
Could anyone tell me what is the equivalent mechanism in SLES(Linux)? Is it possible to allow/deny AD group access with the SLES LDAP... (0 Replies)
Based on the NIS migration tests I did and another question I posted earlier on.
https://www.unix.com/solaris/272021-solaris-8-md5-encryption-support.html
I tried to downgrade NIS linux encryption to DES to support solaris connection.
So I modified /etc/pam.d/system-auth as below,
password... (0 Replies)
Discussion started by: bestard
0 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)