single mode on Solaris

To boot a solaris machine into a single mode. Execute the command below at any terminal

shutdown -i6 -y

network troubleshooting in Solaris

I had an issue with Solaris where the OS is unable to find the network interface.
One of my college run the command below to troubleshoot:

dladm show-dev
dladm show-link
prtconf -D
vi path_to_inst

I'm not sure yet what the command are for. But I will just record it here for my reference in the future.