je tape la commande dans un terminal elle m'affiche bibi@bibi-desktop:~$ /sbin/ifconfig
lo Lien encap:Boucle locale
inet adr:127.0.0.1 Masque:255.0.0.0
adr inet6: ::1/128 Scope:Hôte
UP LOOPBACK RUNNING MTU:16436 Metric:1
Packets reçus:7 erreurs:0 :0 overruns:0 frame:0
TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:0
Octets reçus:372 (372.0 b) Octets transmis:372 (372.0 b)

wlan0 Lien encap:Ethernet HWaddr 00:40:F4:E8:9A:E5
inet adr:172.19.3.7 Bcast:172.19.255.255 Masque:255.255.0.0
adr inet6: fe80::240:f4ff:fee8:9ae5/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:1551 erreurs:0 :0 overruns:0 frame:0
TX packets:1426 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:1243746 (1.1 MiB) Octets transmis:184675 (180.3 KiB)

bibi@bibi-desktop:~$ lspci
0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 81)
0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
0000:00:04.0 Communication controller: Conexant HSF 56k HSFi Modem (rev 01)
0000:00:14.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 22)
0000:00:14.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 10)
0000:00:14.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 10)
0000:00:14.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 10)
0000:00:14.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 30)
0000:00:14.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97 Audio Controller (rev 20)
0000:01:00.0 VGA compatible controller: S3 Inc. ProSavage KM133
bibi@bibi-desktop:~$

voila ce que ta commande m'affiche
le paquet pciutils est installé .....
ps: j'ai aussi un dongle wifi usb
merci pour ta réponse