我正在尝试设置我的 4 个网络接口，使其具有特定的 dns-nameservers 和 dns-search，以便我可以使用其中任何一个连接到我的域，但它无法正常工作，因为当我运行时systemctl restart networking.service它一直在加载但从不工作。它只有在我设置一个时才会起作用，所以我做错了什么，但不确定到底是什么，如果有人可以建议的话。
这是我的 /etc/network/interfaces，它不起作用：
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto enp6s0
iface enp6s0 inet dhcp
dns-nameservers 120.139.14.230 120.139.14.231
dns-search ad.mydomain.com
auto enp7s0
iface enp7s0 inet dhcp
dns-nameservers 120.139.14.230 120.139.14.231
dns-search ad.mydomain.com
auto ens7f0
iface ens7f0 inet dhcp
dns-nameservers 120.139.14.230 120.139.14.231
dns-search ad.mydomain.com
auto ens7f1
iface ens7f1 inet dhcp
dns-nameservers 120.139.14.230 120.139.14.231
dns-search ad.mydomain.com
它的工作原理如下：
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
#auto enp6s0
#iface enp6s0 inet dhcp
# dns-nameservers 120.139.14.230 120.139.14.231
# dns-search ad.mydomain.com
#auto enp7s0
#iface enp7s0 inet dhcp
# dns-nameservers 120.139.14.230 120.139.14.231
# dns-search ad.mydomain.com
auto ens7f0
iface ens7f0 inet dhcp
dns-nameservers 120.139.14.230 120.139.14.231
dns-search ad.mydomain.com
#auto ens7f1
#iface ens7f1 inet dhcp
# dns-nameservers 120.139.14.230 120.139.14.231
# dns-search ad.mydomain.com
所以我想知道如何设置所有接口以具有相同的 dns-nameservers 和 dns-search？
ifconfig -a 的输出：
enp6s0 Link encap:Ethernet HWaddr 2c:4d:54:44:a0:25
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Memory:ce400000-ce47ffff
enp7s0 Link encap:Ethernet HWaddr 2c:4d:54:44:a0:26
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Memory:ce300000-ce37ffff
ens7f0 Link encap:Ethernet HWaddr a0:36:9f:f5:c2:b8
inet addr:120.139.195.90 Bcast:120.139.195.255 Mask:255.255.254.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:29651 errors:0 dropped:1 overruns:0 frame:0
TX packets:7066 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:8988328 (8.9 MB) TX bytes:1500983 (1.5 MB)
ens7f1 Link encap:Ethernet HWaddr a0:36:9f:f5:c2:b9
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:44822 errors:0 dropped:0 overruns:0 frame:0
TX packets:44822 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3514738 (3.5 MB) TX bytes:3514738 (3.5 MB)
ip link show 输出：
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp6s0: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
link/ether 2c:4d:54:44:a0:25 brd ff:ff:ff:ff:ff:ff
3: enp7s0: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
link/ether 2c:4d:54:44:a0:26 brd ff:ff:ff:ff:ff:ff
4: ens7f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether a0:36:9f:f5:c2:b8 brd ff:ff:ff:ff:ff:ff
5: ens7f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
link/ether a0:36:9f:f5:c2:b9 brd ff:ff:ff:ff:ff:ff