in my /etc/inittab file i set
id:3:initdefault:

then my system boots into GUI Mode

but when my edited /etc/inittab to

id:5:initdefault :

it boots into multiuser non GUI Mode

any comments please

That is exactly what it should do. I am wondering by what you mean by "any comments". Do you want to see a few responses on how this could be made easier? Or how to read what id:3:initdefault: means or what? You are changing from a run level 3 to 5 or vice versa. If you want to boot straight into GUI use the 3, if you want to go to command, use 5. If you want something else to happen post it on here, maybe we can help.

I think what he is implying is that runlevel 5 is usually GUI and runlevel 3 usually is multiuser...
In Slack its runlevel 3 as multiuser and 4 as GUI. I wouldn't have any idea why it would switch around like that unless since I don't use Redhat or they did that on purpose.

Post a copy of your /etc/inittab file.

#
# inittab This file describes how the INIT process should set up
# the system in a certain run-level.
#
# Author: Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
# 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)
#
id:5:initdefault:

# System initialization.
si::sysinit:/etc/rc.d/rc.sysinit

l0:0:wait:/etc/rc.d/rc 0
l1:1:wait:/etc/rc.d/rc 1
l2:2:wait:/etc/rc.d/rc 2
l3:3:wait:/etc/rc.d/rc 3
l4:4:wait:/etc/rc.d/rc 4
l5:5:wait:/etc/rc.d/rc 5
l6:6:wait:/etc/rc.d/rc 6

# Things to run in every runlevel.
ud:nce:/sbin/update

# Trap CTRL-ALT-DELETE
ca::ctrlaltdel:/sbin/shutdown -t3 -r now

# When our UPS tells us power has failed, assume we have a few minutes
# of power left. Schedule a shutdown for 2 minutes from now.
# This does, of course, assume you have powerd installed and your
# UPS connected and working correctly.
pf:owerfail:/sbin/shutdown -f -h +2 "Power Failure; System Shutting Down"

# If power was restored before the shutdown kicked in, cancel it.
pr:12345owerokwait:/sbin/shutdown -c "Power Restored; Shutdown Cancelled"


# Run gettys in standard runlevels
1:2345:respawn:/sbin/mingetty tty1
2:2345:respawn:/sbin/mingetty tty2
3:2345:respawn:/sbin/mingetty tty3
4:2345:respawn:/sbin/mingetty tty4
5:2345:respawn:/sbin/mingetty tty5
6:2345:respawn:/sbin/mingetty tty6

# Run xdm in runlevel 5
# xdm is now a separate service
x:3:respawn:/etc/X11/prefdm -nodaemon


#with this configuration my system boot into command mode

thats right runlevel 5 is GUI ??

im using redhat and runlevel 5 is GUI as even shown in the the inittab file ??

Snake

No, read his first post. 5 gives him command line. That's what the whole question is, I was confused too.

change that to:
x:5:respawn:/etc/X11/prefdm -nodaemon

it was set to start the GUI login manager at runlevel 3, even though runlevel 5was set as the GUI runlevel

i may have changed some of configuration files.(i don't remember).

You get that sometimes