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Update CUDA from 9.1 to 10.1 on Ubuntu 18.04

Newer software is being compiled against CUDA 10.2. But some software I need to use requires CUDA 10.1 specifically. Well, my Ubuntu 18.04 box had CUDA 9.1. Lets walk through how to get your system upgraded from CUDA 9.1 to 10.1.

Adding a second drive to LVM on RHEL8

We have all been in the situation where we ran out of space, and need to add another drive. Back before LVM, you would have to add a second drive, create a partition, and find a decent place to mount it. You will be happy to hear those days are over. It is a bit more complicated, but the space is just magically available for LVM to put wherever you need it.