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Use `ssh-keygen` to generate an ssh key pair then add the public key to the user account on your Fedora IoT device:
$ ssh-copy-id testuser@10.11.12.13
Replace the username and IP address with that of your device. Use the `-i` option to specify a key file other than the default of the most recently modified `~/.ssh/id_*pub` file. The `ssh-copy-id` command will append the public key to the user's authorized keys file on the device. It will create the `~/.ssh` directory if it does not already exist and ensure the permission on the files are correct.
Fedora Administration Guide: https://docs.fedoraproject.org/en-US/fedora/latest/system-administrators-guide/infrastructure-services/OpenSSH/#s3-ssh-configuration-keypairs-generating[Generating Key Pairs]
Group Management
Due to how `rpm-ostree` handles user + group entries, it may not be possible to use `usermod -a -G` to add a user to a group successfully. Until `rpm-ostree` moves to using `systemd sysusers`, users will have to populate the `/etc/group` file from the `/usr/lib/group` file before they can add themselves to the group.
For example, if you wanted to add a user to the `libvirt` group:
$ grep -E '^libvirt:' /usr/lib/group | sudo tee -a /etc/group
$ sudo usermod -aG libvirt $USER
You will need to log off and log back in to apply these changes.
This issue is tracked in https://github.com/coreos/rpm-ostree/issues/29[rpm-ostree#29] and https://github.com/coreos/rpm-ostree/issues/49[rpm-ostree#49].
_(Text copied from the https://docs.fedoraproject.org/en-US/fedora-silverblue/troubleshooting/#_unable_to_add_user_to_group[Fedora Silverblue documentation])_
Network Configuration
List the network devices:
$ nmcli dev
DEVICE TYPE STATE CONNECTION
eth0 ethernet connected System eth0
lo loopback unmanaged --
Show details of a device:
$ nmcli dev show eth0
GENERAL.DEVICE: eth0
GENERAL.TYPE: ethernet
GENERAL.HWADDR: B8:27:EB:B4:93:D8
GENERAL.MTU: 1500
...Output Omitted...
List the connection configurations:
$ nmcli con
NAME UUID TYPE DEVICE
System eth0 5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03 ethernet eth0
enp1s0 8a6006ff-a1b5-4048-be93-258087a1853f ethernet --
Only one connection per device can be UP but multiple connections can be defined.
Show connection information:
$ nmcli con show enp1s0
connection.id: enp1s0
connection.uuid: 8a6006ff-a1b5-4048-be93-258087a1853f
connection.stable-id: --
connection.type: 802-3-ethernet
... Output Omitted ...
The `nmcli conn` command has a variety of options including edit, modify, up, down, add, and delete. Use the `nmcli conn help` command to view the syntax.
The default configurations will try to obtain connection information from a DHCP service on your network. If no DHCP service is available on your network, you can add a static connection:
$ nmcli connection add con-name cable ipv4.addresses \
192.168.0.10/24 ipv4.gateway 192.168.0.1 \
connection.autoconnect true ipv4.dns "8.8.8.8,1.1.1.1" \
type ethernet ifname eth0 ipv4.method manual
Connect a device to a wifi SSID, prompting for the password:
$ sudo nmcli –ask device wifi connect SSID-Name
For more wifi options look at:
$ nmcli device wifi help
Fedora Quick Docs: https://docs.fedoraproject.org/en-US/quick-docs/configuring-ip-networking-with-nmcli/[Configuring ip networking with nmcli]
Securing remote access
The root account is locked by default with no password set. The SSH daemon is configured with password authentication disabled for the root account and only allows access remotely if an ssh key has been added.

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$ nmcli dev show eth0
GENERAL.DEVICE: eth0
GENERAL.TYPE: ethernet
GENERAL.HWADDR: B8:27:EB:B4:93:D8
GENERAL.MTU: 1500
...Output Omitted...
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969545 String information

Source string description
type: delimited block -
Flags
no-wrap, read-only
Source string location
./pages/admin-tasks.adoc:117
String age
4 years ago
Last updated
a year ago
Source string age
4 years ago
Translation file
pot/master/pages/admin-tasks.pot, string 36