can not connect to internet

[ditchwitch]

My computer running on Linux will not connect to the internet, It was working a couple of days ago and now it won't connect to the internet. My other computer running on windows and the interac machine are working. Any suggestions?

[Lazydog]

With the information that you have given, no.

Could be a number of things. Any changes take place before it stopped working?
Firewall? Network change? DHCP Server?

Lets start by getting to know your setup.
What do the following commands give you? Please paste the output.

cat /etc/sysconfig/network-scripts/ifcfg-eth0

/sbin/ifconfig

[ditchwitch]

There were no changes that I know of. The computer was shutting off on its own, I cleaned out the fans and it has not shut off since. I don't know if it quit connecting to the internet before or after I cleaned out the fans.

I am new to Linux and don't know were to enter these commands. Also, the light on the network card is not on.

[yancek]

Don't know what distribution/version of Linux you are using but, you should have an icon in the taskbar or on your desktop labelled "terminal" or "konsole" which usually looks like a small computer monitor, often with a seashell in front of it. Run the commands there and post output.

If the light is not on the network card, it may be bad. Power down your computer, remove and re-set the card. If that fails and you have another card, try that to see if it works.

[Lazydog]

There were no changes that I know of. The computer was shutting off on its own

That is why I am asking for the output of the above commands. It is possible that the config files might have gotten corrupt and that would cause the problem you are having.

I am new to Linux and don't know were to enter these commands. Also, the light on the network card is not on.

As stated above you need to enter them in the CLI or console. If push comes to shove and you are still not sure what to do then press together

CTRL + ALT + F2

to get you to a command line. Then log in as root and run the commands I posted above

[ditchwitch]

results are

Device=eth0
BOOTPROTO=none
HWADDR=52:54:05:f0:16:21
ONBOOT=yes
TYPE=ethernet
DHCP_HOSTNAME=server
IPADR=192.168.10.2
NETMASK=255.255.255.0
USERCTL=no
PEERDNS=yes
GATEWAY=192.168.10.1
IPV6INIT=no



LINKENCAP:locaol loop back
INETADDR:127.0.0.1 MASK:255.0.0.0
INET6ADDR: ::1/128 SCOPE:HOST
UP LOOPBACK RUNNING MTU:16436 METRIC:1
RX PACKETS:1183 ERRORS:0 DROPPED:0 OVERRUNS:0 FRAME:0
TX Packets:1183 ERRORS:0 DROPPED:0 OVERRUNS:0 CARRIER:0
COLLISIONS:0 TXQUEUELEN:0
RX BYTES:1240531 (1.1MiB)
TX BYTES:1240531 (1.1MiB)

[Lazydog]

Not sure what version of Linux you are using here so....

results are

Device=eth0
BOOTPROTO=none
HWADDR=52:54:05:f0:16:21
ONBOOT=yes
TYPE=ethernet
DHCP_HOSTNAME=server
IPADR=192.168.10.2
NETMASK=255.255.255.0
USERCTL=no
PEERDNS=yes
GATEWAY=192.168.10.1
IPV6INIT=no

OK, you need to make the following changes:

1. BOOTPROT=static
2. Remove DHCP_HOSTNAME
3. Remove IPV6INIT (not sure about this one)

LINKENCAP:locaol loop back
INETADDR:127.0.0.1 MASK:255.0.0.0
INET6ADDR: ::1/128 SCOPE:HOST
UP LOOPBACK RUNNING MTU:16436 METRIC:1
RX PACKETS:1183 ERRORS:0 DROPPED:0 OVERRUNS:0 FRAME:0
TX Packets:1183 ERRORS:0 DROPPED:0 OVERRUNS:0 CARRIER:0
COLLISIONS:0 TXQUEUELEN:0
RX BYTES:1240531 (1.1MiB)
TX BYTES:1240531 (1.1MiB)

Looks like eth0 isn't being started and I believe the above will fix this problem. After you make the changes to the ifcfg-eth0 file you can issue the following command from the CLI:

/sbin/ifconfig eth0 up

[ditchwitch]

Got it working, the network card came unplugged. Thanks for the help.

[Lazydog]

Sweet, it's always good when the solution is that simple.