Cfrtjryk

I have edited the /etc/sysconfig/network-scripts/ifcfg-enpos2:

BOOTPROTO="static"

IPADDR=192.168.1.105

NETMASK=255.255.255.0

NM_CONTROLLED=no

I can't surf the web when I reboot. How do I start my network again?

systemctl restart network.service

The network isn't connected. Let's see the status.

network.service - LSB: Bring up/down networking

       Loaded: loaded (/etc/rc.d/init.d/network)

       Active: active (exited) since Wed 2015-08-26 17:21:53 CST; 21s ago

      Process: 3494 ExecStop=/etc/rc.d/init.d/network stop (code=exited, status=0/SUCCESS)

      Process: 3674 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/SUCCESS)





Aug 26 17:21:50 localhost.localdomain network[3674]: Bringing up loopback interface:  Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'

Aug 26 17:21:50 localhost.localdomain network[3674]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'

Aug 26 17:21:50 localhost.localdomain network[3674]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'

Aug 26 17:21:50 localhost.localdomain network[3674]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'

Aug 26 17:21:50 localhost.localdomain network[3674]: [  OK  ]

Aug 26 17:21:53 localhost.localdomain network[3674]: Bringing up interface enp2s0:  [  OK  ]

Aug 26 17:21:53 localhost.localdomain systemd[1]: Started LSB: Bring up/down networking.

Here is my ifcfg-lo file:

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

DEVICE=lo

IPADDR=127.0.0.1

NETMASK=255.0.0.0

NETWORK=127.0.0.0

# If you're having problems with gated making 127.0.0.0/8 a martian,

# you can change this to something else (255.255.255.255, for example)

BROADCAST=127.255.255.255

ONBOOT=yes

NAME=loopback

Why can't I load it? How do I set my IP address static and make it connect to the Internet properly?

CentOS 7 switched to systemd - use systemctl restart network.service to restart your network.

For static network settings like yours you may want to install NetworkManager-config-server RPM package using yum

it cost me also lot of time but at least trying this:

# service NetworkManager stop

Redirecting to /bin/systemctl stop NetworkManager.service

# chkconfig NetworkManager off

removed the lo error since the Manger was blocking it.

Just I still dont get internet on my fresh centos 7 installation

Looks like you disabled NetworkManager and now your ifcfg-enp0s2 file doesn't have enough information in it.
In addition to:

BOOTPROTO="static"

IPADDR=192.168.1.105

NETMASK=255.255.255.0

NM_CONTROLLED=no

You also need:

# Specify the default gateway

GATEWAY=<ip of your router>

# Bring the interface up on boot

ONBOOT=yes

# Specify your dns server

DNS1=<ip of your router>