Create a hotspot in your linux(debian) machine

Install hostapd(hotspot server) and dnsmasq (dns dhcp server) : sudo dhclient eth0 or sudo dhclient wlan0
Prevent the installed services starting at the start up :
- sudo service hostapd stop
- sudo service dnsmasq stop
- sudo update-rc.d hostapd disable
- sudo update-rc.d dnsmasq disable
- Setup the configuration file of dnsmasq : sudo gedit /etc/dnsmasq.conf
- paste the code below :
```
# Bind to only one interface
bind-interfaces
interface=wlan0
dhcp-range=192.168.150.2,192.168.150.10
```
- Setup the configuration file of hostapd : sudo gedit /etc/hostapd.conf
- paste the code below :
```
interface=wlan0
driver=nl80211
ssid=JackSparrow
hw_mode=g
channel=11
wpa=1
wpa_passphrase=test12345
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP CCMP
wpa_ptk_rekey=600
macaddr_acl=0
```

You should change the ssid and wpa_passphrase to your preferences

Create hotspot.sh file :sudo gedit hotspot.sh

paste the code below :

#!/bin/bash
# Start
sudo ifconfig wlan0 192.168.150.1
sudo service dnsmasq restart
sudo sysctl net.ipv4.ip_forward=1
sudo iptables -t nat -A POSTROUTING -o eth0-j MASQUERADE
sudo hostapd /etc/hostapd.conf
sudo iptables -D POSTROUTING -t nat -o eth0-j MASQUERADE
sudo sysctl net.ipv4.ip_forward=0
sudo service dnsmasq stop
sudo service hostapd stop