[CentOS] Crashed a CentOS 8 installation.

On 10/16/19 4:05 PM, Jonathan Billings wrote:
> On Wed, Oct 16, 2019 at 04:00:20PM +0530, Thomas Stephen Lee wrote:
>> Failed to switch root: Specified switch root path /sysroot does not seem to
>> be an OS tree. os-release file is missing.
>>
>> What am I doing wrong?
> 
> Tested, and yes, this happens after a reboot, grub2 isn't giving the
> initrd a root disk to switch to.
> 
> I had to edit the grub.cfg and add a single line,
> set default_kernelopts="..."
> 
> (using what was GRUB_CMDLINE_LINUX= was set in /etc/default/grub)
> 
> I'm not exactly sure which package that was installed that caused
> this. 
> 

Create a snapshot of clean VM and divide that list in 10 pieces and
install them one at the time and reboot afterwards. If VM boots, create
another snapshot. When it fails, reverse to previous snaphot and divide
that segment into 5-10 smaller pieces, rinse and repeat.

-- 
Ljubomir Ljubojevic
(Love is in the Air)
PL Computers
Serbia, Europe

StarOS, Mikrotik and CentOS/RHEL/Linux consultant