Can't connect CentOS 7 to network

scottalanmiller

Why CentOS on laptops in the first place? That's the least laptop friendly Linux OS I can think of.

wirestyle22

@NerdyDad said in Can't connect CentOS 7 to network:

@travisdh1 said in Can't connect CentOS 7 to network:

@NerdyDad said in Can't connect CentOS 7 to network:

@travisdh1 said in Can't connect CentOS 7 to network:

@NerdyDad said in Can't connect CentOS 7 to network:

@travisdh1 said in Can't connect CentOS 7 to network:

@NerdyDad said in Can't connect CentOS 7 to network:

@travisdh1 said in Can't connect CentOS 7 to network:

@NerdyDad said in Can't connect CentOS 7 to network:

I am also not getting any activity lights on the network card. Is this normal in Linux?

Well, that's even easier, it's a hardware problem. Nothing should ever effect the blinking lights.

Possibly a driver issue then?

While possible, it's unlikely. The only real exceptoin that comes to mind is Debian with certain closed-source Broadcom drivers. What kind of network card is it, and was it working before?

It used to work before as it was my first coming to this company. I later switched to a newer laptop and put this one in the back for storage.

driver: e1000e
version: 3.2.5-k
firmware-version: 0.12-1
bus-info: 0000:00:19.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no

An Intel e1000e should be fine. Any lights showing on the switch port? No lights on either end = no network.

No lights.

Well, we know where the problem is now, but I doubt you'll be able to change the network card in a laptop

Well crap. I guess I'll use this for a study machine to learn with. I have a few more laptops here that I haven't installed CentOS on yet. I'll test their cards before I install CentOS.

You would see the NIC light up regardless FYI. It only requires about 2 AMPS of power to light up or something.

NerdyDad

@scottalanmiller said in Can't connect CentOS 7 to network:

Why CentOS on laptops in the first place? That's the least laptop friendly Linux OS I can think of.

I am wanting to build out a network for my house with as minimal cost as possible while also being secure. This laptop I was wanting to use for NextCloud while having another laptop for ldap and another for PLEX.

I know that you're going to suggest putting it on a server with XenServer and run each installation as a VM. I have Dell PowerEdge 1950 that I could use, but I don't want to draw that much power and the thing is too noisy to have in the house. It gets too hot for it in the garage.

Have any suggestions? Maybe I could use a Dell Optiplex 380 desktop for either XS or bare-metal CentOS?

scottalanmiller

Intel NUC is a good way to go. SSD and loads of RAM.

travisdh1

@NerdyDad Intel NUC like @scottalanmiller said, or load XenServer on a laptop (just disable low-power modes in the BIOS.) Quiet and low power, also about the lowest reliability possible. That 1950 would draw more power than running it would be worth. If your serious about a home lab, you might want to pickup a T3500 from Stallard Tech, or a low end server from xByte.

wirestyle22

@NerdyDad If power is a concern it's hard to beat a NUC as @scottalanmiller said above. I have a Dell PowerEdge R510 with dual power supplies I got from @BradfromxByte and I honestly didn't see a huge increase in my monthly costs. It runs 24/7.

scottalanmiller

Laptops are a pain to be set up all the time. Hard to cool, hard to place out of the way, look weird.

stacksofplates

@travisdh1 said in Can't connect CentOS 7 to network:

sudo systemctl restart network

If you're using NetworkManager you should disable the network service. You can run into weird issues with both running. I usually also mask it so someone can't turn it on accidentally (doesn't stop them, just gives them a warning that it's been masked.

systemctl stop network
systemctl disable network
systemctl mask network

Then restart NetworkManager

cucezo

May be there is problem in your laptop like you are using wrong drivers or drivers get corrupted by malware. Thus to fix it delete old one and install new one. There is nothing wrong with any other stuff except laptop. If your are using access point then turn off it for at least 1 minute and try connecting again.If still issue exits then check Dell Latitude E4310 Manual for more troubleshooting suggestions.

dafyre

Dumb question from me... Have you tested the network CABLE to make sure it is good?