A3 updates

labs/a3.md

@@ -621,6 +621,30 @@ Use `passwd` to set the root password to `itoolovelinux`.
 > computer.
 </div>
 
+### Network Configuration
+
+There are many ways to manage network connections and interfaces in Linux, in our case we will be using systemd-networkd as our configuration needs are relatively simple.
+
+First we enable systemd-networkd
+```sh
+systemctl enable systemd-networkd.service
+systemctl enable systemd-resolved.service
+```
+
+Create config file
+```sh
+nano /etc/systemd/network/wired.network
+```
+Add the following contents to it
+```sh
+[Match]
+Name=ens2
+
+[Network]
+DHCP=yes
+```
+
+
 ### Boot loader
 
 Historically, GRUB has been the only reasonable choice of boot loader. However,
@@ -689,14 +713,13 @@ password you set!
 **GRADESCOPE**: To show off your newly installed Arch system, run the
 following commands and paste the output into Gradescope:
 ```
-hostname -f
+hostnamectl
 ip addr
 mount
 lsblk
 uname -a
 ```
 
-**Debugging Note:** If the `hostname` command is not found, you may need to install it by running `sudo pacman -S inetutils`. Doing so may also reveal that your internet connection is not yet configured. If this is the case, then you will likely need to `sudo systemctl enable systemd-resolved` and/or `sudo systemctl enable systemd-networkd` and/or `sudo systemctl enable dhcpcd` and/or `ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf `. You can see more information about this in the ArchWiki: https://wiki.archlinux.org/index.php/systemd-networkd. If these instructions do not work, you may also need to [reboot into the Arch installer](https://mycfg.net/articles/booting-from-a-cdrom-in-a-kvm-guest-using-libvirt/) and [use pacstrap to install dhcpcd](https://unix.stackexchange.com/questions/259938/how-to-reinstall-dhcpcd-without-internet-connection/260017).
 
 When you are done, you can hit `ctrl-]` to detach your console from
 the Arch VM and get back to your normal student VM shell.