Solaris 10 X86, /opt runs out space, would anyone please tell me how to increase the size of /opt?
The Solaris is installed on the whole disk, and I believe there are still some free hard disk space available somewhere.
I need step by step guidance please.
Looks like you have installed your Solaris 10 on traditional UFS disk partitions and not using the ZFS whole disk. If so then you need to resize de underlying partition using the format command and then run the growfs to resize the /opt.