Security, PKI, sys and network admins

How to change the MTU of a network interface with ifconfig in Linux

Your network interface might not act properly by not having an speed unknown value for example and this is sometimes caused by an abnormal MTU value for your network interface. You can change that using the ifconfig command.

How to bring a network interface up or down with ifconfig in Linux

On some machines running Ubuntu frequently, you can easily restart (down/up state) a network interface by ultimately using the ifconfig command.