Questions[wireless-access-point](ubuntu)

As headline stated: I am looking for instructions on how to setup an access point using netplan, including setting up a bridge between eth0 and wlan0. DHCP Server would be my router, to which the system is connected via eth0. I am running Ubuntu Server 18.04. (I used to be able to do it following examples using ifupdown and hostapd, but now I need to stay with netplan..)

• What packages need to be installed for this?
• Beside setting up a yaml file, what needs to be done?
• where is the bridge (i.e.br0) defined?
• where are credentails like ssid and password set?
• Could you share an example yaml file (i.e. with eth0 wlan0) for the above scenario? (I need a solution without using iptables, as this can not be used in my system)

As I am far from being an expert, the more detailed the instructions, the better....

I have Ubuntu 18.04 in my PC together with Windows 10. When the WiFi works on Windows and I restart the computer to Ubuntu, the WiFi is OK even in Ubuntu. But when the computer is shuted down and I start with Ubuntu, there is apparently no way to start the WiFi. Can someone help me to make the WiFi available in Ubuntu directly?

I typed inxi -F as recommended in comments and the result is as follows:

System:    Host: kouty-ThinkCentre-M720q Kernel: 5.0.0-37-generic x86_64
           bits: 64
           Desktop: Gnome 3.28.4 Distro: Ubuntu 18.04.3 LTS
Machine:   Device: un-determined System: LENOVO product: 10T7004NIV v: ThinkCentre M720q serial: N/A
           Mobo: LENOVO model: 312D v: SDK0J40697 WIN 3305169475212 serial: N/A
           UEFI: LENOVO v: M1UKT47A date: 08/14/2019
CPU:       6 core Intel Core i5-8400T (-MCP-) cache: 9216 KB
           clock speeds: max: 3300 MHz 1: 3200 MHz 2: 3192 MHz 3: 3106 MHz
           4: 3288 MHz 5: 3105 MHz 6: 3105 MHz
Graphics:  Card: Intel Device 3e92
           Display Server: x11 (X.Org 1.20.4 ) driver: i915
           Resolution: [email protected]
           OpenGL: renderer: Mesa DRI Intel UHD Graphics 630 (Coffeelake 3x8 GT2)
           version: 4.5 Mesa 19.0.8
Audio:     Card Intel Cannon Lake PCH cAVS driver: snd_hda_intel
           Sound: Advanced Linux Sound Architecture v: k5.0.0-37-generic
Network:   Card-1: Intel Ethernet Connection (7) I219-V driver: e1000e
           IF: eno1 state: down mac: e8:6a:64:2d:a4:ee
           Card-2: Intel Wireless 8265 / 8275 driver: iwlwifi
           IF: wlp1s0 state: up mac: 50:76:af:56:b2:60
Drives:    HDD Total Size: 256.1GB (3.5% used)
           ID-1: /dev/sda model: SanDisk_SD9TB8W2 size: 256.1GB
Partition: ID-1: / size: 59G used: 8.4G (16%) fs: ext4 dev: /dev/sda5
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 46.0C mobo: N/A
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 253 Uptime: 2 min Memory: 1248.8/7844.9MB
           Client: Shell (bash) inxi: 2.3.56 

Further I opened the "Show applications" and typed wifi and they say me I have "no wifi adapter found". So I restarted and opened Windows, the wifi started to work. I restarted again and opened Ubuntu and I have a good wifi. If I turn it off, I can "no more connect because "no wifi adapter found". Can someone explain me how I can install the right wifi adapter. I seen a lot of posts here and Ubuntu documentation, and don't know what is the right procedure.

The kernel version is Linux 5.3.0-28-generic I understand that I need some WiFi adapter congruent with Card-2: Intel Wireless 8265 / 8275 driver: iwlwifi

Update following the advise of @pilot6. I typed when the wifi doesn't work

kouty@kouty-ThinkCentre-M720q:~$ lspci -knn | grep Net -A3; rfkill list; dmesg | grep iwl
01:00.0 Network controller [0280]: Intel Corporation Wireless 8265 / 8275 [8086:24fd] (rev 78)
    Subsystem: Intel Corporation Dual Band Wireless-AC 8265 [8086:1010]
    Kernel modules: iwlwifi
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
[    4.098054] iwlwifi 0000:01:00.0: enabling device (0000 -> 0002)
[    4.191186] iwlwifi: probe of 0000:01:00.0 failed with error -110

OS: Ubuntu 11.10 with gnome-shell

I've few access points on my saved list which I want to remove and never connect to. I can't seem to find way to delete these.

How should I remove (at least not auto connect) from saved access point list?

I wanted to use my desktop with a wired ethernet connection (eth0) to operate my "TP-LINK TL-WN722N" USB Wifi Adapter (wlan0) as a non-adhoc (infrastructure mode) access point for my Android to connect to.

After MUCH searching, I finally found a method (spread across many websites) that does most of what I need...

Dependencies:

 hostapd
 bridge-utils

I modified "/etc/network/interfaces"

sudo gedit /etc/network/interfaces

to contain:

# This file describes the network interfaces available on your system
# and how to activate them.

auto lo br0
iface lo inet loopback

allow-hotplug eth0
iface eth0 inet manual

allow-hotplug wlan0
iface wlan0 inet manual

# Bridge setup

# for dhcp address
iface br0 inet dhcp
bridge_ports eth0 wlan0

# for static ip
# iface br0 inet static
# bridge_ports eth0 wlan0
# adapt with your network settings
# address 192.168.1.250
# netmask 255.255.255.0
# network 192.168.1.0
# broadcast 192.168.1.255
# gateway 192.168.1.1
# dns-* options are implemented by the resolvconf package, if installed
# dns-nameservers 192.168.1.1
# dns-search localdomain

### Reference ###

# Creating a Wireless Access Point with Debian Linux « Agent Oss (October 31, 2011)
# https://agentoss.wordpress.com/2011/10/31/creating-a-wireless-access-point-with-debian-linux/

My "/etc/hostapd/hostapd.conf" (which I somehow managed to put together myself)

sudo gedit /etc/hostapd/hostapd.conf

contains:

 ### Guts ###

 interface=wlan0
 bridge=br0
 driver=nl80211

 ### General ###

 ssid=____________________
 hw_mode=g
 channel=1

 ### Security ###

 macaddr_acl=0
 auth_algs=1
 ignore_broadcast_ssid=0     ## 0 visible # 1 hidden ##
 wpa=2
 wpa_passphrase=____________________
 wpa_key_mgmt=WPA-PSK
 wpa_pairwise=TKIP
 rsn_pairwise=CCMP

 ### Reference ###

 ## Created Tuesday, February 14, 2012 ## Ubuntu 11.10/12.04 ##

 # Hostapd Linux Documentation Page
 # http://linuxwireless.org/en/users/Documentation/hostapd

 # Creating a Network Bridge on Ubuntu (January 16th, 2011)
 # http://webserver.linuxportal.nl/?p=422

(I've edited out the security bits for this post)

All of that allows me to open up a Terminal and execute:

 sudo hostapd -B /etc/hostapd/hostapd.conf

to have a functioning access point that my Android and all other WiFi devices can connect to.

Aside from sharing this method with others since info for this setup is so sparse; there are three problems that would be nice to fix:

1. This configuration deactivates network manager and all of its functions. When you click it, it gives a "device not managed" message. (not essential, but a bit annoying to me)
2. This method can struggle with IP addresses from time to time.
3. I must use a terminal to turn on Wifi. (Ok for me, but not family friendly). I figured out how to make a launcher using gksu and a simple script if anyone needs one...

4. (Why can't network manager do this out-of-the-box??)

Thanks in advance! I hope all of this can help someone else; I've never written a tutorial before and know virtually nothing about networking...

Perhaps related to network bridge - without destroying network manager (among others).

Tested using Ubuntu 11.10, 12.04.

How can I set up my WiFi to be used as wireless access point on Ubuntu Server?

I have a local Ubuntu Server, it has a wireless card in it (802.11a/b/g/n) and I really want to set it up as an 802.11n access point since my normal access point does not support N.

It needs to work as a switch as well so I can connect and get DHPC through.

Edit: I don't see Network Manager as a good solution since it depends on a lot of X11 packages, and i don't want that on a server.