I'm not able to create a hotspot in order to share my wifi connection.
I use Linux Mint and I want connect my phone to WIFI through my laptop hotspot.
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If you have wired connection, then do this:
Go to "Network Connections" from bottom-corner networking icon.
Click on "Add" and choose "Wi-Fi" option.
Give the connection name (to adapter not SSID).
Provide a name of your hotspot in SSID field.
Set mode to Hotspot.
Open the terminal and type
ifconfig (make sure your wireless in on) and there will be usually 3 subsections.
Find where it says something like "wl01" and look for "HWaddr".
You should have something like
Copy that address and paste in "Device".
Go to "Wi-Fi Security" and choose "WPA & WPA2 personal" or any type of security of your preference and set up a good password.
Now, go to "IPv4 Settings" and set the "Mode" to "Shared to other computers".
Save your settings and connect your hotspot from "Connect to Hidden Network..." and you're done.
Instructions for Mint 17:
Go to Main Menu -> Preferences -> Network Connections, click on Add and choose Wi-Fi. Choose a network name (SSID), Infrastructure mode. Go to to Wi-Fi Security and choose WPA/WPA2 Personal and create a password. Go to IPv4 settings and check that it is shared with other computers.
sudo vi /etc/NetworkManager/system-connections/YOUR_CONNECTION_NAME and change
mode=ap, then save the file.
Click on Network Manager near clocks and choose "Connect to hidden wireless network", then choose your connection.
On Linux Mint 19.3 Cinnamon, you can have most of this automated by following these steps:
The hotspot can be disabled by turning off the selected device.