Set Password for Single User Mode on Linux (CentOS / RHEL)
Senin, 16 September 2013
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http://www.nextstep4it.com/categories/how-to/single-user-mode
Setting Password for Single User Mode on Centos 5.X / RHEL 5.X )
Edit the file /etc/inittab , add “su:S:wait:/sbin/sulogin” above the line initdefault as shown below :
Setting Password for Single User Mode on Centos 6.X / RHEL 6.X )
Edit the file /etc/sysconfig/init & replace 'SINGLE=/sbin/sushell' with '/sbin/sulogin' as shown below :
Overview :
Setting Password for Single User Mode in Linux , adds security to Linux boxes. If some one access your server physically & reboot server and then tries to change root password from single user mode . In that case if password is set on single user mode , one has to first enter root password , then only can reset root password .
Note - In Debian like Operating System require root password when booting into single user mode or recovery mode. But RHEL & CentOS allows access from the console into single user mode without a password.
Setting Password for Single User Mode in Linux , adds security to Linux boxes. If some one access your server physically & reboot server and then tries to change root password from single user mode . In that case if password is set on single user mode , one has to first enter root password , then only can reset root password .
Note - In Debian like Operating System require root password when booting into single user mode or recovery mode. But RHEL & CentOS allows access from the console into single user mode without a password.
Setting Password for Single User Mode on Centos 5.X / RHEL 5.X )
Edit the file /etc/inittab , add “su:S:wait:/sbin/sulogin” above the line initdefault as shown below :
#
# inittab This file describes how the INIT process should set up
# the system in a certain run-level.
#
# Author: Miquel van Smoorenburg,
# Modified for RHS Linux by Marc Ewing and Donnie Barnes
#
# Default runlevel. The runlevels used by RHS are:
# 0 - halt (Do NOT set initdefault to this)
# 1 - Single user mode
# 2 - Multiuser, without NFS (The same as 3, if you do not have networking)
# 3 - Full multiuser mode
# 4 - unused
# 5 - X11
# 6 - reboot (Do NOT set initdefault to this)
#
su:S:wait:/sbin/sulogin
id:5:initdefault:
# inittab This file describes how the INIT process should set up
# the system in a certain run-level.
#
# Author: Miquel van Smoorenburg,
# Modified for RHS Linux by Marc Ewing and Donnie Barnes
#
# Default runlevel. The runlevels used by RHS are:
# 0 - halt (Do NOT set initdefault to this)
# 1 - Single user mode
# 2 - Multiuser, without NFS (The same as 3, if you do not have networking)
# 3 - Full multiuser mode
# 4 - unused
# 5 - X11
# 6 - reboot (Do NOT set initdefault to this)
#
su:S:wait:/sbin/sulogin
id:5:initdefault:
Setting Password for Single User Mode on Centos 6.X / RHEL 6.X )
Edit the file /etc/sysconfig/init & replace 'SINGLE=/sbin/sushell' with '/sbin/sulogin' as shown below :
# What ttys should gettys be started on?
ACTIVE_CONSOLES=/dev/tty[1-6]
# Set to '/sbin/sulogin' to prompt for password on single-user mode
# Set to '/sbin/sushell' otherwise
SINGLE=/sbin/sulogin
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Judul: Set Password for Single User Mode on Linux (CentOS / RHEL)
Ditulis oleh Unknown
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Rating Blog 5 dari 5
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