debian10.0设置永久IP（与界面配置相同，请注意你的系统版本，其它版本未测试，此仅供参考）

注意：此配置和/etc/network/interfaces下永久配置同时只有一个会生效，如果/etc/network/interfaces配置了，当前界面配置的会默认失效。配置时尽量网线插好。

1.查看网卡uuid

#nmcli con

NAME      UUID                                  TYPE      DEVICE  

network1  02d47e45-a303-370a-bb18-b506f16a6fbc  ethernet  enp1s0  

network2  cb0acc94-b3f7-38cd-b99f-9d405799a98d  ethernet  enp2s0

2.查看网卡信息(目前物理网卡为)

#ip address

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host 

       valid_lft forever preferred_lft forever

2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000

    link/ether 84:c9:b2:73:f3:86 brd ff:ff:ff:ff:ff:ff

    inet 192.168.1.50/8 brd 192.168.1.255 scope global noprefixroute enp1s0

       valid_lft forever preferred_lft forever

    inet6 fe80::93a1:4f15:8d67:a0fb/64 scope link noprefixroute 

       valid_lft forever preferred_lft forever

3: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    link/ether bc:30:5b:c7:67:59 brd ff:ff:ff:ff:ff:ff

    inet 2.168.1.50/24 brd 2.255.255.255 scope global noprefixroute enp2s0

       valid_lft forever preferred_lft forever

    inet6 fe80::1593:279a:aee1:9e60/64 scope link noprefixroute 

       valid_lft forever preferred_lft forever

3.查看当前配置

# cat /etc/NetworkManager/NetworkManager.conf 

[main]

plugins=ifupdown,keyfile

[ifupdown]

managed=false

# ls /etc/NetworkManager/system-connections/

network1.nmconnection  network2.nmconnection

4.添加网卡配置

# vi /etc/NetworkManager/system-connections/network1.nmconnection

[connection]

id=network1 (可自定义命令，保持与network1.nmconnection的前缀相同)

uuid=02d47e45-a303-370a-bb18-b506f16a6fbc

type=ethernet

autoconnect-priority=-999

permissions=

timestamp=1579046993

[ethernet]

mac-address=84:c9:b2:73:f3:86 (手动添加要修改为正确的网卡MAC地址，和uuid对应即可)

mac-address-blacklist=

[ipv4]

address1=192.168.1.50/24,192.168.1.254 （IP/掩码（8-255.0.0.0,24-255.255.255.0）,网关IP）

dns=192.168.0.8;（DNS IP，分号";"不要缺少）

dns-search=

method=manual

[ipv6]

addr-gen-mode=stable-privacy

dns-search=

method=auto

5.保存重启即可。