Ca y'est j'ai recu mon dongle Edimax EW-7811Un et ça fonctionne 
Mon interface Wi-Fi a une adresse IP:
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP8000> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether b8:27:eb:a0:d9:77 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP8000> mtu 1500 qdisc mq qlen 1000
link/ether 74:da:38:eb:4a:15 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.11/24 brd 192.168.0.255 scope global wlan0
valid_lft forever preferred_lft forever
inet6 fe80::76da:38ff:feeb:4a15/64 scope link
valid_lft forever preferred_lft forever
$
Et je peux downloadé un fichier de test:
$ wget -O /dev/null http://speedtest.wdc01.softlayer.com/downloads/test10.zip
--2018-08-05 20:11:34-- http://speedtest.wdc01.softlayer.com/downloads/test10.zip
Resolving speedtest.wdc01.softlayer.com (speedtest.wdc01.softlayer.com)... 208.43.102.250, 2607:f0d0:3001:78::2
Connecting to speedtest.wdc01.softlayer.com (speedtest.wdc01.softlayer.com)|208.43.102.250|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 11536384 (11M) [application/zip]
Saving to: '/dev/null'
/dev/null 100%[=================================================>] 11.00M 601KB/s in 20s
2018-08-05 20:11:55 (550 KB/s) - '/dev/null' saved [11536384/11536384]
$
Merci pour l'aide
