I am new to Debian (previously using Ubuntu, which is also Debian based). When I installed it on my Lenovo G450 laptop, I skipped the wireless configuration (I really didn't know how to do that).
After the installation, I found no wireless network available.
iface wlan0 inet dhcp
/etc/network/interface, then typed
iwlist wlan0 scan
But the terminal told me that "interface not support for this operation".
Anyway I tried
iwconfig wlan0 essid xxx key xxx
and the terminal said: "invalid argument".
Can anyone help? I had to turn to Fedora/Ubuntu again. They have
network-manager to configure the wireless network, but Debian does not. I wanted to install
network-manager, but I can't connect to the internet.