Regenerate Initramfs File in Linux | Resolve Kernel Panic Error in Redhat Enterprise Linux

Kernel Panic Error Resolution in RHEL 7/8:
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1. See the details of Kernel Panic Error (Identify the reason behind it eg. New Kernel, Corrupted initramfs, New Packages after Patching, Hardware change etc.)

2. Login the system with root credentials through rescue mode.

3. Take necesarry action as the reason of getting this error.
If it is due to new kernel, then downgrade it.
If it is due to corrupted or missing initramfs, regenerate it.

4. In our case it is due to corrupted/absent initramfs file. First check your kernel version.
# uname -r

5. Now regenerate initramfs with dracut or mkinitrd command: (here your kernel version should be same as in previous command result)
To create new initramfs use:
OR

To replace exsiting initramfs file use:
OR
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#NehraClasses

[vemagantianand]

Was very useful nehra sir got to know in simple steps

[saisandy]

Thank you so much sir. These videos boot up my knowledge

[chinnakumar]

Awesome Explanation :) loved the presentation

[michealobinna]

I think you did a great job in your presentation. Thank you so much.

[vishwaschaudhary]

Thank you sir for great explanation 👍 👏 👌 🙏

[saisandy]

Thank so much for sharing your knowledge

[sureshk]

Excellent presentation - keep up the good work

[Afro_Updates]

Top IT firm do ask this question during the first phone interview for devops cloud support

[tabbytabrez]

Sir how can we check if any module is creating the kernel panic error...lsmod will list all modules but which module is creating the error how to make sure...pls confirm

[MrPrabhu]

Sir can you teach how to get in emergency mode please

[siddharthkumar]

sir can you please explain how can I restore our initramfs and vmlinuz file through CD thankyou.

[rajeshchhetri-]

Help me I had a problem: kernel panic not syncing attempting to kill init exit code

[pratikmuli]

In my case, normal user mode as well as rescue mode lands me to emergency shell, dracut/# terminal saying "1. Warning /dev/mapper/rhel-root does not exist
2. /dev/rhel/root does not exist
3. /dev/rhel/swap does not exist
Gemerating"
Can you please help?!

[MohitGupta-ivuc]

Sir what if initramfs image for resuce mode get deleted ?? . Does it follow vice-versa

[akshaybagde]

Why in Ubuntu it's almost impossible to resolve this kernel panic error

[manjitkumar]

In MY case not working, can you please help

[kashefshaikh]

Do we have such videos if kernel itself corrup in Linux server, if it is there please give me link thanks

[sreepaljsp]

i think, you have missed one step.. when you enter into rescue mode, system loads under "/mnt/sysimage" ... then you need to change it to root by giving "#chroot /mnt/sysimage"

[hemanthkumar-xnvu]

any idea about "failed to start login services" in rhel 7.6

[mishu]

Ce Nu ai inteles? Iti mai sexplic o data