Bringing Interfaces Up/Down

Two methods can be used to bring interfaces up or down.

Using "ip"

From the command line, use:

ip link set dev <interface> up
ip link set dev <interface> down
Example:
ip link set dev eth0 up
ip link set dev eth0 down

Using "ifconfig"

From the command line, use:

/sbin/ifconfig <interface> up
/sbin/ifconfig <interface> down
Example:
/sbin/ifconfig eth0 up
/sbin/ifconfig eth0 down