Hallo, today we will make from our Linux Mint 17 machine a Wi-Fi access point, for this we do not need any additional software, just easy as 1-2-3:

1. 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 a WPA/WPA2 Personal and create a password. Go to IPv4 settings and check that it is shared with other computers.

2. Do sudo vi /etc/NetworkManager/system-connections/YOUR_CONNECTION_NAME and change mode=infrastructure to mode=ap and save it.

3. Click on Network Manager near clocks and choose connect to hidden wireless network --> choose your connection --> enjoy.

P.S. If it does not work, run iw list and check in Supported interface modes: * AP, if you do not have AP there, probably your Wi-Fi card does not support this mode.