Boot Linux Grub Into Single User Mode?

jaydul · 04-19-2015, 05:30 PM

Hello I just install centOS 7 now.and update centOS 7 now 4 grub booting.I don't wanna kill times and wanna single load with grub.

frankbell · 04-19-2015, 08:26 PM

Do you mean that you want to eliminate the delay or wait time between when GRUB starts and when it calls the OS?

And do you really want to boot into single-user mode? That's really for system rescue, not for day-to-day computer operations.

T3RM1NVT0R · 04-19-2015, 08:44 PM

Quote:

Originally Posted by jaydul

Hello I just install centOS 7 now.and update centOS 7 now 4 grub booting.I don't wanna kill times and wanna single load with grub.

Could you please let us know what exactly you are trying to do? Information you have provided is not at all clear. It will be good if you provide us the details on what is the situation and what you are trying to do.

jaydul · 04-20-2015, 12:18 AM

Here is 4 grab info when booting centOS 7
Like
http://computersecuritystudent.com/U...2/index.17.jpg
e for edit.
[Ctrl]-[x]

I want boot loader from only 1st boot.and only one boot need to need and automated booting from it

[tuhin@localhost ~]$ uname -r
3.10.0-229.1.2.el7.x86_64
[tuhin@localhost ~]$ cat /etc/redhat-release
CentOS Linux release 7.1.1503 (Core)

ondoho · 04-20-2015, 03:23 PM

i think you want to edit /etc/default/grub, e.g. with

Code:

sudo nano /etc/default/grub

and make sure the line starting with

Code:

GRUB_TIMEOUT=...

reads

Code:

GRUB_TIMEOUT=0

after that you must run

Code:

sudo grub-mkconfig -o /boot/grub/grub.cfg

this will immediately start booting the default entry.
i do not recommend it (maybe better to set the timeout to at least 1).

John VV · 04-22-2015, 02:42 PM

it is NOT recommended to change the 3 second countdown to 0 seconds

you REALLY WILL WANT THAT 3 SECONDS!!!!!!!!!
if you change it to 0 normal everyday fixes will become harder
and if you NEED to fix a bad update - that will become harder