系统版本为：almalinux9.2
通过nmcli命令配置网络信息，此命令由 NetworkManager 包提供。

# 查看当前配置文件，从RHEL9.0开始，以key-file格式保存在下面路径中
[root@localhost ~]# cat /etc/NetworkManager/system-connections/ens192.nmconnection 
[connection]
id=ens192
uuid=c887eead-1da4-31f7-9f28-3277c4a72774
type=ethernet
autoconnect-priority=-999
interface-name=ens192
timestamp=1694517980

[ethernet]

[ipv4]
method=auto

[ipv6]
addr-gen-mode=eui64
method=auto

[proxy]

通过method=auto判断现在是自动获取的状态。改为固定ip。

# 配置网卡ip，ens192为网卡名
[root@localhost ~]# nmcli connection modify ens192 ipv4.method manual ipv4.addresses 192.168.12.240/24 ipv4.gateway 192.168.12.1 ipv4.dns 114.114.114.114,8.8.8.8 connection.autoconnect yes 
[root@localhost ~]# cat /etc/NetworkManager/system-connections/ens192.nmconnection 
[connection]
id=ens192
uuid=c887eead-1da4-31f7-9f28-3277c4a72774
type=ethernet
autoconnect-priority=-999
interface-name=ens192
timestamp=1694662356

[ethernet]

[ipv4]
address1=192.168.12.240/24,192.168.12.1
dns=114.114.114.114;8.8.8.8;
method=manual

[ipv6]
addr-gen-mode=eui64
method=auto

[proxy]

 

# 添加额外的ip，单网卡多ip。
[root@localhost ~]# nmcli connection modify ens192  +ipv4.addresses 192.168.89.11/24
[root@localhost ~]# nmcli connection modify ens192  +ipv4.addresses 192.168.89.12/24
[root@localhost ~]# nmcli connection modify ens192  +ipv4.addresses 192.168.89.13/24
[root@localhost ~]# cat /etc/NetworkManager/system-connections/ens192.nmconnection 
[connection]
id=ens192
uuid=c887eead-1da4-31f7-9f28-3277c4a72774
type=ethernet
autoconnect-priority=-999
interface-name=ens192
timestamp=1694662356

[ethernet]

[ipv4]
address1=192.168.12.240/24,192.168.12.1
address2=192.168.89.11/24
address3=192.168.89.12/24
address4=192.168.89.13/24
dns=114.114.114.114;8.8.8.8;
method=manual

[ipv6]
addr-gen-mode=eui64
method=auto

[proxy]

 

# 激活配置
[root@localhost ~]# nmcli connection up ens192 

 

# 删除一个ip
[root@localhost ~]# nmcli connection modify ens192 -ipv4.addresses 192.168.89.13/24
[root@localhost ~]# cat /etc/NetworkManager/system-connections/ens192.nmconnection 
[connection]
id=ens192
uuid=c887eead-1da4-31f7-9f28-3277c4a72774
type=ethernet
autoconnect-priority=-999
interface-name=ens192
timestamp=1694669933

[ethernet]

[ipv4]
address1=192.168.12.240/24,192.168.12.1
address2=192.168.89.11/24
address3=192.168.89.12/24
dns=114.114.114.114;8.8.8.8;
method=manual

[ipv6]
addr-gen-mode=eui64
method=auto

[proxy]

# 另外仍然支持ifcfg-配置文件形式（但不建议）
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens192 
TYPE=Ethernet
Device=ens192
IPADDR=192.168.12.240
NETMASK=255.255.255.0
GATEWAY=192.168.12.1
DNS1=114.114.114.114
ONBOOT=yes
BOOTPROTO=static

# 通过systemctl重启无效
[root@localhost ~]# systemctl restart NetworkManager

# 需要下面方式重启
[root@localhost ~]# nmcli connection reload
[root@localhost ~]# nmcli networking off
[root@localhost ~]# nmcli networking on