Unknown user at 04:44, 19 August 2020

2020-08-19T04:44:11Z

← Older revision		Revision as of 04:44, 19 August 2020
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	Up: [[Ubuntu/Bespin]]		Up: [[Ubuntu/Bespin]]

			Next: [[Ubuntu/Bespin/Gnome Setup]]

	==Aptitude update==		==Aptitude update==

Unknown user: Admin moved page Bespin/Initial Setup to Ubuntu/Bespin/Initial Setup

2020-08-18T02:54:40Z

Admin moved page Bespin/Initial Setup to Ubuntu/Bespin/Initial Setup

← Older revision	Revision as of 02:54, 18 August 2020
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Unknown user at 02:54, 18 August 2020

2020-08-18T02:54:34Z

← Older revision		Revision as of 02:54, 18 August 2020
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			Up: [[Ubuntu/Bespin]]

	==Aptitude update==		==Aptitude update==

Unknown user: Created page with "==Aptitude update== During installation, we allow setup to join the wifi network. On first boot, the network manager will be running and will be connected to the same wifi ne..."

2020-08-18T02:54:18Z

Created page with "==Aptitude update== During installation, we allow setup to join the wifi network. On first boot, the network manager will be running and will be connected to the same wifi ne..."

New page

==Aptitude update==

During installation, we allow setup to join the wifi network. On first boot, the network manager will be running and will be connected to the same wifi network. We will disable network manager eventually, but first get some software.

<pre>
sudo apt-get update
sudo apt-get -y install vim gnome-tweak-tool net-tools
</pre>

Set caps lock as a control key.

==Allow sudo for user==

Create wheel group:

<pre>
sudo groupadd wheel
</pre>

Add user to group:

<pre>
sudo usermod -a -G wheel <your-username-here>
</pre>

Allow wheel group users passwordless sudo, first use visudo to edit the sudoers file:

<pre>
EDITOR=vi visudo
</pre>

Now add this line to the end:

<pre>
%wheel ALL=(ALL) NOPASSWD: ALL
</pre>

==Install ssh==

Install ssh and server:

<pre>
sudo apt-get install ssh
</pre>

Start the server:

<pre>
sudo service ssh start
</pre>

===Install trusted ssh key===

If you want, set up a machine to securely SSH into the Ubuntu server.

From the machine you want to SSH <b>FROM</b>:

<pre>
cat ~/.ssh/id_rsa.pub
</pre>

Copy this text. Now in another terminal, ssh into the Ubuntu server. Paste the output of the above command into the file:

<pre>
~/.ssh/authorized_keys
</pre>

Now verify that SSHing into the Ubuntu server will not ask you for a password.

==Configure WPA Supplicant==

We want to configure wifi manually, and disable the network manager. This requires some preparation to manually join a wifi network with wpa supplicant.

First set your wpa supplicant to join a wifi network.

<code>/etc/wpa_supplicant/wpa_supplicant.conf</code>

<pre>
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
ssid="yournetworkhere"
proto=RSN
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
psk="yourpskhere"
}
</pre>

Don't forget the WPA supplicant service (two steps down)

==Name Network Interfaces==

Ubuntu 18.04 does this annoying thing where the wifi interfaces are awful to type and impossible to remember because they contain the ENTIRE MAC ADDRESS OF THE DEVICE.

To fix this, rename the network devices. The following file will not exist on a fresh Ubuntu install, so create it with the following contents (one line per network device you want to rename):

<code>/etc/udev/rules.d/70-persistent-net.rules</code>

<pre>
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="02:01:02:03:04:05", ATTR{dev_id}=="0x0", ATTR{type}=="1", NAME="wlan0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="02:01:02:03:04:06", ATTR{dev_id}=="0x0", ATTR{type}=="1", NAME="wlan1"
</pre>

==Configure Network Interfaces==

Next add the wifi interface to the network interfaces file:

* wlan0 will be joining an existing wifi network

The following lines should be APPENDED to any existing network interfaces file:

<code>/etc/network/interfaces</code>

<pre>
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
</pre>

==WPA Supplicant Startup Service==

Copy a wpa supplicant service template:

<pre>
sudo cp /lib/systemd/system/wpa_supplicant.service /etc/systemd/system/wpa_supplicant.service
</pre>

Edit the file

<pre>
sudo vim /etc/systemd/system/wpa_supplicant.service
</pre>

Change this line from this:

<pre>
ExecStart=/sbin/wpa_supplicant -u -s -O /run/wpa_supplicant
</pre>

to this:

<pre>
ExecStart=/sbin/wpa_supplicant -u -s -c /etc/wpa_supplicant/wpa_supplicant.conf -i wlan0
</pre>

Also, remove the following line if it is present:

<pre>
Alias=dbus-fi.w1.wpa_supplicant1.service # DELETE ME!
</pre>

Now enable this service to start on boot:

<pre>
sudo systemctl enable wpa_supplicant.service
</pre>

==Dhclient on Startup==

The dhclient command must be run on startup after the wifi is set up so that bespin will get an IP address.

Create an rc.local startup service:

<code>/etc/systemd/system/rc-local.service</code>

<pre>
[Unit]
Description=/etc/rc.local
ConditionPathExists=/etc/rc.local

[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSec=0
StandardOutput=tty
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target
</pre>

Now add the dhclient command to rc.local:

<code>/etc/rc.local</code>

<pre>
#!/bin/bash
/sbin/dhclient wlan0
exit 0
</pre>

Make it executable:

<pre>
chmod 744 /etc/rc.local
</pre>

Now enable the rc-local service:

<pre>
sudo systemctl enable rc-local.service
</pre>

Verify it works okay:

<pre>
sudo systemctl start rc-local.service
sudo systemctl status rc-local.service
</pre>

===Requesting Static IP===

If you want to request a static IP from the router, add this to the dhclient config file:

<code>/etc/dhcp/dhclient.conf</code>

<pre>
interface "wlan0" {
send dhcp-requested-address 192.168.0.122;
}
</pre>

==Disable Network Manager==

Next step is to disable the network manager. It takes a lot of commands. Too many commands.

<pre>
sudo systemctl stop NetworkManager.service
sudo systemctl disable NetworkManager.service

and three more services:

sudo systemctl stop NetworkManager-wait-online.service
sudo systemctl disable NetworkManager-wait-online.service

sudo systemctl stop NetworkManager-dispatcher.service
sudo systemctl disable NetworkManager-dispatcher.service

sudo systemctl stop network-manager.service
sudo systemctl disable network-manager.service
</pre>

Don't uninstall it, though, because that will uninstall a bunch of other important gnome packages and you'll be left with a stupid broken ubuntu.

Now reboot

<pre>
sudo reboot now
</pre>

Run <code>sudo service --status-all</code> and verify network manager is not running.

==Test Wifi==

Test that everything is working as expected by running the ifconfig and iwconfig commands.

* <code>ifconfig</code> should show an IP address for the wlan0 interface that the wpa_supplicant connects with
* <code>iwconfig</code> should show the name of the wifi network that wlan0 is connected to (same one defined in <code>wpa_supplicant.conf</code>)

===Troubleshooting===

If you don't have an IPv4 address, troubleshoot with the following commands:

Check if you can reach the internet:

<pre>
ping google.com
</pre>

Check logs from dhcp service started by rc.local (this gets an IP address from the router and is the most likely culprit):

<pre>
sudo service rc-local status
</pre>

Check logs from wpa supplicant:

<pre>
sudo service wpa_supplicant status
</pre>

[[Category:Bespin]]
[[Category:Ubuntu]]
[[Category:Linux]]
[[Category:Wifi]]
[[Category:Aptitude]]

Ubuntu/Bespin/Initial Setup - Revision history

Unknown user at 04:44, 19 August 2020

Unknown user: Admin moved page Bespin/Initial Setup to Ubuntu/Bespin/Initial Setup

Unknown user at 02:54, 18 August 2020

Unknown user: Created page with "==Aptitude update== During installation, we allow setup to join the wifi network. On first boot, the network manager will be running and will be connected to the same wifi ne..."