# tree -L 1 /etc/net/ifaces/enp7s0/etc/net/ifaces/enp7s0
├── ipv4address
├── ipv4route
├── options
└── resolv.conf
# cat /etc/net/ifaces/enp7s0/options TYPE=eth
CONFIG_WIRELESS=no
BOOTPROTO=static
SYSTEMD_BOOTPROTO=static
CONFIG_IPV4=yes
DISABLED=no
NM_CONTROLLED=no
SYSTEMD_CONTROLLED=no
ONBOOT=yes
# ip link set
down dev enp7s0
# ip link set
up dev enp7s0
#
ip a s enp7s0: <BROADCAST,MULTICAST,
UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
<
NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> - no-carrier означает, нет кабеля или контакта с роутером