Cannot find the "eth0 and wlan0" options in the ifconfig list

[HappyTree123]

Can anyone help me on this problem? I have struggled a couple days to sort it out, but failed.

When typing "sudo ifconfig",

only "lo" option appears, but I cannot see "eth0 and wlan0" options.

Can anyone tell me what is wrong with my setting?

My RPI is a little bit old. RPI B +.

Many thanks in advance.

HappyTree

[Luuk]

With dmesg you can see the messages (and errors) that are generated during boot.

My eth0 is saying 'link is not ready', because I do not have a cable attached.

Code: Select all

pi@raspberrypi:~ $ dmesg | grep eth0
[    1.875032] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:3b:e0:fc
[    6.254094] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[    6.254616] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

What kind of errors do you see? (if any!)