Hi fellows,
Pretty new to CentOS. I was trying to find a way to boot CentOS into command prompt instead of GUI (or without loading any services). Tried using 'Crl+Alt+F1' at the boot process, but, that holds the screen at mounting and doing fstab and doesn't proceed further. Is there anyother way to boot CentOS into command prompt without using Rescue option from the installation CD?
Thanks.
Best.
Quoting ABBAS KHAN bashukhan@gmail.com:
Hi fellows,
Pretty new to CentOS. I was trying to find a way to boot CentOS into command prompt instead of GUI (or without loading any services). Tried using 'Crl+Alt+F1' at the boot process, but, that holds the screen at mounting and doing fstab and doesn't proceed further. Is there anyother way to boot CentOS into command prompt without using Rescue option from the installation CD?
Edit the /etc/inittab file and change the line that says:
id:5:initdefault:
to
id:3:initdefault:
This will tell your system to boot into text mode. If you want to switch while you are running .. you can type "init 3" to go to text mode and "init 5" to go to graphical mode. This will need to be done as the root user.
Barry
Barry Brimer wrote:
id:3:initdefault:
This will tell your system to boot into text mode. If you want to switch while you are running .. you can type "init 3" to go to text mode and "init 5" to go to graphical mode. This will need to be done as the root user.
The obligatory warning:- Run level 3 may have different services loaded than run level 5. Study the output from "chkconfig --list" on your server to see what services are started in each run level.
E.g.:- [root@zaphod ~]# chkconfig --list nfslock 0:off 1:off 2:off 3:on 4:on 5:on 6:off ypbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off acpid 0:off 1:off 2:off 3:on 4:on 5:on 6:off diskdump 0:off 1:off 2:off 3:off 4:off 5:off 6:off webmin 0:off 1:off 2:on 3:on 4:off 5:on 6:off cqcs_acs 0:off 1:off 2:on 3:on 4:on 5:on 6:off ntpd 0:off 1:off 2:off 3:on 4:off 5:on 6:off xfs 0:off 1:off 2:on 3:on 4:on 5:on 6:off snmpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off nscd 0:off 1:off 2:off 3:off 4:off 5:off 6:off syslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off sysstat 0:off 1:on 2:on 3:on 4:on 5:on 6:off cpuspeed 0:off 1:on 2:on 3:on 4:on 5:on 6:off readahead 0:off 1:off 2:off *3:off* 4:off *5:on* 6:off smartd 0:off 1:off 2:on 3:on 4:on 5:on 6:off rpcsvcgssd 0:off 1:off 2:off 3:on 4:on 5:on 6:off radiusd 0:off 1:off 2:off 3:off 4:off 5:off 6:off mysqld 0:off 1:off 2:on 3:on 4:off 5:on 6:off <snip>
Ian
On Mon, Aug 18, 2008 at 2:46 PM, ABBAS KHAN bashukhan@gmail.com wrote:
Hi fellows,
Pretty new to CentOS. I was trying to find a way to boot CentOS into command prompt instead of GUI (or without loading any services). Tried using 'Crl+Alt+F1' at the boot process, but, that holds the screen at mounting and doing fstab and doesn't proceed further. Is there anyother way to boot CentOS into command prompt without using Rescue option from the installation CD?
You can change to multi-processing command line mode with 'init 3' and single user mode with the command 'init 1'. Modes can be changed dynamically in a running system.
See the file /etc/inittab, it lists all the possible modes, the first line of this file defines the default mode:
id:5:initdefault:
which defaults to running the GUI at boot, change it to:
id:3:initdefault:
to not run the GUI at boot.
Brett
On Mon, Aug 18, 2008 at 11:46 AM, ABBAS KHAN bashukhan@gmail.com wrote:
Hi fellows,
Pretty new to CentOS. I was trying to find a way to boot CentOS into command prompt instead of GUI (or without loading any services). Tried using 'Crl+Alt+F1' at the boot process, but, that holds the screen at mounting and doing fstab and doesn't proceed further. Is there anyother way to boot CentOS into command prompt without using Rescue option from the installation CD?
When the grub screen showing which OS it will boot in X seconds comes up, type <space>, edit the boot line and add a " 3" (with the space but without the quotes) to the end of the line, and it will come up at level 3 (no GUI).
mhr
Once you boot into GUI you can login as root or login as a user and once in a terminal window su - to root and then change the line in /etc/inittab from id:5:initdefault: to id:3:initdefault:
You can also do init 3 after saving the change to see what will happen before rebooting. This will keep the GUI login from being run and boot all enabled console screens and leave you at a character login.
The way to boot without any services as needed is to login as root or become root with su - once the system is booted into runlevel 3 or 5 and do init 1 or telinit 1. This will put the system in single user runlevel and shut off all services similar to rescue mode. This would only allow you work from the console until you changed back to runlevel 3 or 5.
_____
From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of ABBAS KHAN Sent: Monday, August 18, 2008 1:46 PM To: centos@centos.org Subject: [CentOS] Boot CentOS 5 to command line
Hi fellows,
Pretty new to CentOS. I was trying to find a way to boot CentOS into command prompt instead of GUI (or without loading any services). Tried using 'Crl+Alt+F1' at the boot process, but, that holds the screen at mounting and doing fstab and doesn't proceed further. Is there anyother way to boot CentOS into command prompt without using Rescue option from the installation CD?
Thanks.
Best.
On Monday 18 August 2008 14:46:22 ABBAS KHAN wrote:
Hi fellows,
Pretty new to CentOS. I was trying to find a way to boot CentOS into command prompt instead of GUI (or without loading any services). Tried using 'Crl+Alt+F1' at the boot process, but, that holds the screen at mounting and doing fstab and doesn't proceed further. Is there anyother way to boot CentOS into command prompt without using Rescue option from the installation CD?
Thanks.
Best.
Then there is the temporary method for when you forget the passwd. Or simply want to get into single user mode. Which is to add the word single to the kernel boot line (if you are using GRUB boot loader, which is default in CentOS).
When GRUB appears press any key to stop the automatic countdown. Select the kernel to boot from and press e for edit. Then cursor down to the line that starts with kernel (usually the 2nd line), and press e to edit that line. Go to the end of the line and add a space and the word single. Press Enter to accept your change, and b to boot. It will now boot with your change.
Please note, since we did not actually alter the config file it will not retain this change at any subsequent boots.
Thanks you :)
On Mon, Aug 18, 2008 at 12:33 PM, Bobby bobby@d4business.com wrote:
On Monday 18 August 2008 14:46:22 ABBAS KHAN wrote:
Hi fellows,
Pretty new to CentOS. I was trying to find a way to boot CentOS into command prompt instead of GUI (or without loading any services). Tried using 'Crl+Alt+F1' at the boot process, but, that holds the screen
at
mounting and doing fstab and doesn't proceed further. Is there anyother way to boot CentOS into command prompt without using Rescue option from the installation CD?
Thanks.
Best.
Then there is the temporary method for when you forget the passwd. Or simply want to get into single user mode. Which is to add the word single to the kernel boot line (if you are using GRUB boot loader, which is default in CentOS).
When GRUB appears press any key to stop the automatic countdown. Select the kernel to boot from and press e for edit. Then cursor down to the line that starts with kernel (usually the 2nd line), and press e to edit that line. Go to the end of the line and add a space and the word single. Press Enter to accept your change, and b to boot. It will now boot with your change.
Please note, since we did not actually alter the config file it will not retain this change at any subsequent boots.
--
Bobby _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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ABBAS KHAN -
Barry Brimer -
Bobby -
Brett Serkez -
Ian Blackwell -
MHR -
Michael Peterson