02-04-2009
The number that appears in the XXXXXXXXX portion of the error message
is quite important in diagnosing the problem. This number
(without the leading zeros) corresponds to an error type defined
in /usr/include/sys/errno.h. The most common are 2, 13, and 23.
errno 2
-------
An errno of 2 corresponds to:
ENOENT 2 /* No such file or directory */
This can happen if the file dld.sl does not exist in /lib (at HP-UX 9.x)
or /usr/lib (at HP-UX 10.x). Typically, you will start getting these
errors if someone moves the directory that contains dld.sl, or moves
dld.sl itself. To resolve the problem, move it back!
Another case when you can get an errno 2 is at HP-UX 10.x when
the file is expected in its HP-UX 9.x location. This can be
worked around in the short term by symbolically linking /lib
to /usr/lib:
ln -s /usr/lib /lib
The long term solution is to make sure that the application expects
to find dld.sl in /usr/lib.
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LEARN ABOUT CENTOS
pam_nologin
PAM_NOLOGIN(8) Linux-PAM Manual PAM_NOLOGIN(8)
NAME
pam_nologin - Prevent non-root users from login
SYNOPSIS
pam_nologin.so [file=/path/nologin] [successok]
DESCRIPTION
pam_nologin is a PAM module that prevents users from logging into the system when /var/run/nologin or /etc/nologin exists. The contents of
the file are displayed to the user. The pam_nologin module has no effect on the root user's ability to log in.
OPTIONS
file=/path/nologin
Use this file instead the default /var/run/nologin or /etc/nologin.
successok
Return PAM_SUCCESS if no file exists, the default is PAM_IGNORE.
MODULE TYPES PROVIDED
The auth and acct module types are provided.
RETURN VALUES
PAM_AUTH_ERR
The user is not root and /etc/nologin exists, so the user is not permitted to log in.
PAM_BUF_ERR
Memory buffer error.
PAM_IGNORE
This is the default return value.
PAM_SUCCESS
Success: either the user is root or the nologin file does not exist.
PAM_USER_UNKNOWN
User not known to the underlying authentication module.
EXAMPLES
The suggested usage for /etc/pam.d/login is:
auth required pam_nologin.so
NOTES
In order to make this module effective, all login methods should be secured by it. It should be used as a required method listed before any
sufficient methods in order to get standard Unix nologin semantics. Note, the use of successok module argument causes the module to return
PAM_SUCCESS and as such would break such a configuration - failing sufficient modules would lead to a successful login because the nologin
module succeeded.
SEE ALSO
nologin(5), pam.conf(5), pam.d(5), pam(8)
AUTHOR
pam_nologin was written by Michael K. Johnson <johnsonm@redhat.com>.
Linux-PAM Manual 09/19/2013 PAM_NOLOGIN(8)