Wifi

Commands

• iwconfig, get information or configure a wireless network interface

sudo iwconfig           # Get information
sudo iwconfig wlan0     # Configure

• iwlist, get more detailed wireless information from a wireless interface

sudo iwlist scan
sudo iw dev wlan0 scan

• rfkill, show state of RF SW/HW kill switch (WiFi / BT / ...)

rfkill list all

Troubleshoot wifi

# Check device
lsusb                # if wifi usb device
lspci                # if wifi pci device

# Check if device has an interface
iwconfig

# Check status interfaces
ifconfig

Wifi is either controlled by NetworkManager or via the command line.

NetworkManager

Command file

• See file /etc/network/interfaces. See man page man interfaces
• For WPA, see file /etc/wpa_supplicant/wpa_supplicant.conf.

Miscellaneous

Wireless deauthentication code from [1]: About syslog wlan0: deauthenticated from 00:1d:7e:0c:24:5e (Reason: 14), see [2]: That means that the WPA encryption code is failing and the packet is corrupt. I would worry about that corrupt beacon from the AP. Troubleshooting WiFi (opensuse post) Getting info on WiFi (opensuse post)

3 Deauthenticated because sending station is leaving (or has left) IBSS or ESS. 14 MIC failure.

• See Common Issues