I went in to the YAST expert partitioner and tried to resize /dev/sdb1 to the new maximum. The partitioner can see the the additional storage.
But I got a message that says I need to unmount the file system.
I tried doing this using both Yast and umount but both times got a message that the system was in use.
What is the best way to get this filesystem resized?
I have read about changing the kernel parameters to boot in single user mode. I am a little wary of this because I don't want to end up with a problem booting. If this is the correct approach please provide and example of the change to make. But I have also read that the filesystem cannot be enlarged while the system is running at all.
One suggestion was that I would need to boot from ISO or CD to achieve this resize. If so how can I make or obtain a bootable ISO and how would it work?