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I need SERIOUS help on GRUB in CentOS 7.5 1804

Good afternoon from Singapore,

I need SERIOUS help on GRUB in CentOS 7.5 1804.

Please refer to my installation notes at http://lists.linuxfromscratch.org/pipermail/lfs-chat/2018-October/028964.html

According to Petros' instructions, I need GRUB Legacy 0.97 for my Extremely Simple Linux. But GRUB Legacy 0.97 has been deprecated in CentOS 7.5. GRUB2 is installed by default on CentOS 7.5.

So I defied Petros' instructions and used GRUB2 for my Extremely Simple Linux compilation, with the end result that I do not see any operating system selection menu on GRUB2. What I get is a grub prompt and I need to enter the following GRUB2 commands:

grub> linux /boot/vmlinuz-4.18.12 root=/dev/sda1 ro quiet
grub> boot

(1) If I seriously want to use GRUB2 for my Extremely Simple Linux, I would need to modify /boot/grub/grub.cfg to suit GRUB2. Because Petros' /boot/grub/grub.cfg is meant for GRUB Legacy. Am I right? I am no expert on GRUB.

(2) If I want to use GRUB Legacy for my Extremely Simple Linux, I would need to use CentOS 6 instead of CentOS 7?

(3) If I insist on using CentOS 7.5, is there any way of getting rid of GRUB2 and installing GRUB Legacy instead?

If you watch my short 2-min YouTube video at <a href="https://www.youtube.com/watch?v=YrJADssqaQU" title="https://www.youtube.com/watch?v=YrJADssqaQU">https://www.youtube.com/watch?v=YrJADssqaQU</a> , I am not getting any operating system selection menu on GRUB2. I am getting a grub> prompt only.

Please advise.

Thank you.

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Comments

[SOLVED] I need SERIOUS help on GRUB in CentOS 7.5 1804

By Turritopsis Doh... at 10/11/2018 - 11:38

Good morning from Singapore,

I have solved the problem in implementing GRUB Legacy 0.97 for my Extremely Simple Linux. My solution is posted at

<a href="http://lists.linuxfromscratch.org/pipermail/lfs-chat/2018-October/028968.html" title="http://lists.linuxfromscratch.org/pipermail/lfs-chat/2018-October/028968.html">http://lists.linuxfromscratch.org/pipermail/lfs-chat/2018-October/028968...</a>

Now I will need to learn how to implement GRUB2 for my Extremely Simple Linux.

Thank you.

Good afternoon from Singapore,

I need SERIOUS help on GRUB in CentOS 7.5 1804.

Please refer to my installation notes at <a href="http://lists.linuxfromscratch.org/pipermail/lfs-chat/2018-October/028964.html" title="http://lists.linuxfromscratch.org/pipermail/lfs-chat/2018-October/028964.html">http://lists.linuxfromscratch.org/pipermail/lfs-chat/2018-October/028964...</a>

According to Petros' instructions, I need GRUB Legacy 0.97 for my Extremely Simple Linux. But GRUB Legacy 0.97 has been deprecated in CentOS 7.5. GRUB2 is installed by default on CentOS 7.5.

So I defied Petros' instructions and used GRUB2 for my Extremely Simple Linux compilation, with the end result that I do not see any operating system selection menu on GRUB2. What I get is a grub prompt and I need to enter the following GRUB2 commands:

grub> linux /boot/vmlinuz-4.18.12 root=/dev/sda1 ro quiet
grub> boot

(1) If I seriously want to use GRUB2 for my Extremely Simple Linux, I would need to modify /boot/grub/grub.cfg to suit GRUB2. Because Petros' /boot/grub/grub.cfg is meant for GRUB Legacy. Am I right? I am no expert on GRUB.

(2) If I want to use GRUB Legacy for my Extremely Simple Linux, I would need to use CentOS 6 instead of CentOS 7?

(3) If I insist on using CentOS 7.5, is there any way of getting rid of GRUB2 and installing GRUB Legacy instead?

If you watch my short 2-min YouTube video at <a href="https://www.youtube.com/watch?v=YrJADssqaQU" title="https://www.youtube.com/watch?v=YrJADssqaQU">https://www.youtube.com/watch?v=YrJADssqaQU</a> , I am not getting any operating system selection menu on GRUB2. I am getting a grub> prompt only.
Teo En Ming Extremely Simple Linux 1810.08 - YouTube<https://www.youtube.com/watch?v=YrJADssqaQU>
<a href="http://www.youtube.com" title="www.youtube.com">www.youtube.com</a>
Teo En Ming Extremely Simple Linux 1810.08

Please advise.

Thank you.

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Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
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Turritopsis Dohrnii Teo En Ming's Academic Qualifications – Historical Records, Office of the Grand Historian<https://tdtemcerts.wordpress.com/>
tdtemcerts.wordpress.com
Historical Records, Office of the Grand Historian

[2] <a href="http://tdtemcerts.blogspot.sg/" title="http://tdtemcerts.blogspot.sg/">http://tdtemcerts.blogspot.sg/</a>
[https://4.bp.blogspot.com/-ef0ZeVnu5So/W7d8YTwgjGI/AAAAAAAAAHI/V_0J0ZQvj7sdvFU9bKQaPP7Naop-XJ8pwCLcBGAs/w1200-h630-p-k-no-nu/September%2B2018.jpg]<http://tdtemcerts.blogspot.sg/>

Turritopsis Dohrnii Teo En Ming's Academic Qualifications<http://tdtemcerts.blogspot.sg/>
tdtemcerts.blogspot.sg
Historical Records, Office of the Grand Historian

[3] <a href="https://www.scribd.com/user/270125049/Teo-En-Ming" title="https://www.scribd.com/user/270125049/Teo-En-Ming">https://www.scribd.com/user/270125049/Teo-En-Ming</a>
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Re: [SOLVED] I need SERIOUS help on GRUB in CentOS 7.5

By Yves Bellefeuille at 10/11/2018 - 14:02

Using Windows 10 to run CentOS 6 under Virtual Box, using Putty to log
into CentOS (what?) and rebuilding a bunch of programmes from source
isn't "Extremely Simple".