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

2.1. Using "ip"
Usage:

# ip link set dev  up
# ip link set dev  down
Example:


# ip link set dev eth0 up
# ip link set dev eth0 down
2.2. Using "ifconfig"
Usage:

# /sbin/ifconfig  up
# /sbin/ifconfig  down
Example:

# /sbin/ifconfig eth0 up
# /sbin/ifconfig eth0 down