Oracle Linux 7.6 black screen while boot from virtualbox
I am trying to boot my oracle linux 7.6 which is running under virtual box but black screen appear long time
Causes :
Network manager & network manager wait online service have a problem
Solution :
Boot as rescue mode like below
Edit mode (e)
end of line linux16, add below command
systemd.unit=target.rescue
control + x –> enter
Maintenance mode will appear
Enter root password maintenance
Execute below command
systemctl mask systemd-NetworkManager-wait-online.service
reboot the machine
The network manager may have a problem after restarted the machine, so start the network manager like below
systemctl enable NetworkManager
systemctl unmask NetworkManager.service
systemctl start NetworkManager.service
In case selinux may also making issue for black screen appeared while booting. Please disable and reboot the machine.