Just simply right click on network icon on the taskbar, edit connections then wireless connection. Supply details like id of wifi access point passcode and you are up and running
I believe Ubuntu Server edition does not contains any WindowManager to configure WiFi. You should edit /etc/network/interfaces file with your WiFi network information something below :
auto wlan0 iface wlan0 inet static address 192.168.1.150 netmask 255.255.255.0 gateway 192.168.1.1 wpa-ssid <your_router> wpa-psk <your_wpa_key> dns-nameservers 8.8.8.8 192.168.1.1
Dear Mayuresh,
Request you to search in Internet before posting here, for getting such simple solutions.
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