Network Interface Configuration

How do ethernet, serial, and wireless network interfaces appear in linux?

en, sl, wl

If a Network interface is plugged into a PCI slot, how is it represented?

en/sl/wls1

If a network interface is plugged into a USB slot, how is it represented?

en/sl/wlp*s*

If a network interface is integrated into the motherboard, how is it represented?

en/sl/wl01

What commands do you use to see IP info?

ifconfig, ip addr show

What is the downside to using ifconfig for static IP assignments?

It is not persistent

What file must you create to make ifconfig static IP assignments persistent?

/etc/sysconfig/network/

What command do you use to bring down a network interface? what about to bring it up? (if)

ifdown int, ifup int

What command do you use to request an IP address from a DHCP server?

dhclient int

What command do you use to assign a static IP using ip? What about to delete an IP address?

ip addr add ipaddr/cidr dev int, ip addr del ipaddr/cidr dev int

What command do you use to disable a network interface? What about enable it? (ip)

ip link set int down, ip link set int up

What command do you use to stop/start the network service? What about restarting it?

systemctl stop network, systemctl start network, systemctl restart network

What command on init systems do you use to start/restart the network service?

service network start, service network stop

What command do you use to manage Ethernet card properties?

ethtool

What command do you use to manage wireless network interfaces?

iwconfig

What command do you use to manage the ethernet bridge?

brctl

What is network interface bonding?

Combining a group of network interfaces into a single logical bonded interface

How many interfaces can be bonded together?

8

What directory contains network configuration files?

/etc/sysconfig/network-scripts/ifcfg-*

What file is used to configure nameserver addresses?

/etc/resolv.conf