Chapter 5: Advanced Linux Administration

1. The Linux kernel.
2. Systemd-udevd.
3.  ls /sys/class/net and ip link show.
4. The Azure agent for Linux.
5.  ls /sys/class/net and lsblk. The lsscsi command can be helpful as well.
6. It is a good idea to use RAID0 to improve performance and allow improved throughput compared to using just a single disk.
7. At the filesystem level using BTRFS or ZFS, or at the block level using Linux Software Raid (mdadm) or LVM (not covered in this chapter).
8. Create the raid, format it, and make a mount point: 

mdadm --create /dev/md127 --level 0 --raid-devices 3 \
    /dev/sd{c,d,e}
mkfs.xfs -L myraid /dev/md127

mkdir /mnt/myraid

Create a unit file, /etc/systemd/system/mnt-myraid.mount:

[Unit]
Description = myRaid volume

[Mount]
Where = /mnt/myraid
What = /dev/md127
Type = xfs

[Install]
WantedBy = local-fs.mount

Start and enable it at boot: 

systemctl enable --now mnt-myraid.mount