I browsed for similar questions and found a few but these were old and seemed to be system-specific. Hope you don't mind I ask again.
I have a DELL OptiPlex XE2 with Ubuntu 12.04 LTS installed. I am able to connect to wireless but not wired networks.
First I tried just plug the ethernet cable in (which works for windows computers so it is live), the wired network is disconnected and offline. Next, I tried to use a static IP address by (1) NetworkManager way, or (2) network/interface way, as I found on the internet, neither works.
I tried network-manager restart, ping localhost, NIC seems OK.
> sudo service network-manager restart network-manager stop/waiting network-manager start/running, process 8073 > ping localhost PING localhost (127.0.0.1) 56(84) bytes of data. 64 bytes from localhost (127.0.0.1): icmp_req=1 ttl=64 time=0.018 ms 64 bytes from localhost (127.0.0.1): icmp_req=2 ttl=64 time=0.043 ms 64 bytes from localhost (127.0.0.1): icmp_req=3 ttl=64 time=0.020 ms
I don't know what are the standard diagnosis inputs so please let me know so I could post them here. Thanks a lot in advance!
"sudo dhclient eth0" gave no output after a long while.
Network card is eth0.
ifconfig eth0 eth0 Link encap:Ethernet HWaddr 34:17:eb:c0:7c:bd inet6 addr: fe80::3617:ebff:fec0:7cbd/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1812601 errors:0 dropped:5557 overruns:0 frame:0 TX packets:22373 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:180155598 (180.1 MB) TX bytes:5596062 (5.5 MB) Interrupt:20 Memory:f7f00000-f7f20000