04-02-2012
I believe it is due to SELinux permissions. Make SELinux permissive (setenforce 0) and you should be able to change the root password in single user mode.
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LEARN ABOUT CENTOS
sestatus
sestatus(8) SELinux command line documentation sestatus(8)
NAME
sestatus - SELinux status tool
SYNOPSIS
sestatus [-v] [-b]
This tool is used to get the status of a system running SELinux.
DESCRIPTION
This manual page describes the sestatus program.
This tool is used to get the status of a system running SELinux. It displays data about whether SELinux is enabled or disabled, location of
key directories, and the loaded policy with its status as shown in the example:
> sestatus
SELinux status: enabled
SELinuxfs mount: /selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: permissive
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allow
Max kernel policy version: 26
sestatus can also be used to display:
- The security context of files and processes listed in the /etc/sestatus.conf file. The format of this file is described in ses-
tatus.conf(5).
- The status of booleans.
OPTIONS
-v
Displays the contexts of files and processes listed in the /etc/sestatus.conf file. It also checks whether the file is a symbolic
link, if so then the context of the target file is also shown.
The following contexts will always be displayed:
The current process context
The init process context
The controlling terminal file context
-b
Display the current state of booleans.
FILES
/etc/sestatus.conf
AUTHOR
This man page was written by Daniel Walsh <dwalsh@redhat.com>.
The program was written by Chris PeBenito <pebenito@gentoo.org>
SEE ALSO
selinux(8), sestatus.conf(5)
Security Enhanced Linux 26 Nov 2011 sestatus(8)