Ubuntu22.04Desktop桌面版设置静态Ip

Ubuntu22.04Desktop桌面版静态Ip设置

Ubuntu22.04Desktop桌面版可以用图形界面配置Ip, 图形界面有桌面的和控制台的nmtui ,
也能用 nmcli 一步设置

sudo nmcli c m '有线连接 1' ipv4.method 'manual' ipv4.addr "192.168.168.224/24" ipv4.gateway "192.168.168.2" ipv4.dns "192.168.168.2 , 8.8.4.4 , 223.6.6.6 , 180.76.76.76, 123.125.81.6, 1.1.1.1,8.8.8.8,114.114.114.114" ipv4.ignore-auto-dns 'true' ipv4.dns-search "baidu.com" ; sudo systemctl restart NetworkManager

也可以像Server版一样用netplan,
但它们底层的Ip配置工具是不一样的,

• desktop版用NetworkManager
• server版用systemd-networkd

查看 NetworkManager 的状态

systemctl status NetworkManager

• Desklop桌面版的 NetworkManager.service 默认启用并处于活跃状态
• Server服务版默认没有 NetworkManager.service 这项服务

查看 systemd-networkd 的状态

systemctl status systemd-networkd

• Desklop桌面版有 systemd-networkd.service 这项服务, 但默认没有启用
• Server服务版有 systemd-networkd.service 这项服务, 默认启用并处于活跃状态

在图形界面设置静态Ip

点右上角, 有线 下的 有线设置

设置为这样

/etc/NetworkManager/system-connections/'有线连接 1.nmconnection' 文件也相应发生变化

sudo cat /etc/NetworkManager/system-connections/'有线连接 1.nmconnection'

[connection]
id=有线连接 1
uuid=fdae7e35-2f0e-3c31-8717-2b998d902f57
type=ethernet
autoconnect-priority=-999
interface-name=ens33
timestamp=1665711319

[ethernet]

[ipv4]
address1=192.168.168.224/24,192.168.168.2
dns=192.168.168.2;114.114.114.114;8.8.8.8;223.6.6.6;101.226.4.6;180.76.76.76;119.29.29.29;8.8.4.4;
ignore-auto-dns=true
method=manual

[ipv6]
addr-gen-mode=stable-privacy
method=auto

[proxy]

但是,反向从该文件修改却不行, 图形界面的配置并不会随之更改…
好吧, 是我把权限改成chmod 777le
把权限改回只有所属用户可以读写

sudo chmod 600 /etc/NetworkManager/system-connections/'有线连接 1.nmconnection'

sudo chmod 600 *.nmconnection

编辑 *.nmconnection , 因为是桌面版, 所以可以用 gedit, 要有管理员权限, 所以在控制台sudo gedit ,
也可以直接打开

sudo gedit /etc/NetworkManager/system-connections/'有线连接 1.nmconnection'

sudo gedit /etc/NetworkManager/system-connections/*.nmconnection

[connection]
id=有线连接 1
uuid=fdae7e35-2f0e-3c31-8717-2b998d902f57
type=ethernet
autoconnect-priority=-999
interface-name=ens33
timestamp=1665711319

[ethernet]

[ipv4]
address1=192.168.168.224/24,192.168.168.2
dns=192.168.168.2;8.8.4.4;223.6.6.6;101.226.4.6;180.76.76.76;119.29.29.29;114.114.114.114;8.8.8.8;1.1.1.1
ignore-auto-dns=true
method=manual

[ipv6]
addr-gen-mode=stable-privacy
method=auto

[proxy]

修改保存后

sudo systemctl restart NetworkManager

图形界面也随之变成了


修改成功
,
再来试一试 netplan
,
, 一开始, 在/etc/netplan/文件夹下 ,有个 01-network-manager-all.yaml

cat /etc/netplan/01-network-manager-all.yaml

内容为

# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager

这是用netplan来配置网络的配置文件

sudo vi /etc/netplan/01-network-manager-all.yaml
sudo nano /etc/netplan/01-network-manager-all.yaml
sudo gedit /etc/netplan/01-network-manager-all.yaml

将其修改为

network:
  version: 2
  #renderer: NetworkManager
  ethernets:
    ens33:
      addresses: [192.168.168.224/24]
      routes:
        - to: default # default 等效 0.0.0.0/0 等效 0/0   # could be 0/0 or 0.0.0.0/0 optionally
          via: 192.168.168.2  # 网关
      nameservers:
        addresses: # DNS的ip
         [ 192.168.168.2 , 8.8.4.4 , 223.6.6.6 , 114.114.114.114, 180.76.76.76 , 119.29.29.29 , 8.8.8.8 , 101.226.4.6, 123.125.81.6, 1.1.1.1]
        search: 
         [ 192.168.168.2 , 8.8.4.4 , 223.6.6.6 , 114.114.114.114, 180.76.76.76 , 119.29.29.29 , 8.8.8.8 , 101.226.4.6, 123.125.81.6, 1.1.1.1]

注意 #renderer: NetworkManager 被注释了

sudo netplan try

sudo netplan apply

图形界面的 有线 变成了 为托管

但网络是好的, 可以上网, 也可以远程
查看ip

ip a
ip ad
ip add
ip addr
ip addre
ip addres
ip address

z@U224d:/$ ip add
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:4b:7d:6d brd ff:ff:ff:ff:ff:ff
    altname enp2s1
    inet 192.168.168.224/24 brd 192.168.168.255 scope global ens33
       valid_lft forever preferred_lft forever

ip 是正常的

查看 NetworkManager 和 systemd-networkd 的状态

systemctl status NetworkManager

systemctl status systemd-networkd

z@U224d:/$ systemctl status NetworkManager
● NetworkManager.service - Network Manager
     Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
     Active: active (running) since Mon 2022-10-17 16:23:41 CST; 6min ago
       Docs: man:NetworkManager(8)
   Main PID: 9289 (NetworkManager)
      Tasks: 3 (limit: 9415)
     Memory: 3.0M
        CPU: 96ms
     CGroup: /system.slice/NetworkManager.service
             └─9289 /usr/sbin/NetworkManager --no-daemon

10月 17 16:23:41 U224d NetworkManager[9289]: <info>  [1665995021.9998] ifupdown: interfaces file /etc/network/interfaces doesn't exist
10月 17 16:23:42 U224d NetworkManager[9289]:   [1665995022.0007] dhcp-init: Using DHCP client 'internal'
10月 17 16:23:42 U224d NetworkManager[9289]: <info>  [1665995022.0008] device (lo): carrier: link connected
10月 17 16:23:42 U224d NetworkManager[9289]: <info>  [1665995022.0009] manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/1)
10月 17 16:23:42 U224d NetworkManager[9289]: <info>  [1665995022.0013] device (ens33): carrier: link connected
10月 17 16:23:42 U224d NetworkManager[9289]: <info>  [1665995022.0015] manager: (ens33): new Ethernet device (/org/freedesktop/NetworkManager/Devic>
10月 17 16:23:42 U224d NetworkManager[9289]: <info>  [1665995022.0103] failed to open /run/network/ifstate
10月 17 16:23:42 U224d NetworkManager[9289]: <info>  [1665995022.0276] modem-manager: ModemManager available
10月 17 16:23:42 U224d NetworkManager[9289]: <info>  [1665995022.0344] manager: startup complete
10月 17 16:23:42 U224d NetworkManager[9289]: <info>  [1665995022.1451] agent-manager: agent[7fa0626e63224f7a,:1.38/org.gnome.Shell.NetworkAgent/100>
z@U224d:/$ 
z@U224d:/$ 
z@U224d:/$ systemctl status systemd-networkd
● systemd-networkd.service - Network Configuration
     Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled-runtime; vendor preset: enabled)
     Active: active (running) since Mon 2022-10-17 09:06:41 CST; 7h ago
TriggeredBy: ● systemd-networkd.socket
       Docs: man:systemd-networkd.service(8)
   Main PID: 684 (systemd-network)
     Status: "Processing requests..."
      Tasks: 1 (limit: 9415)
     Memory: 3.0M
        CPU: 222ms
     CGroup: /system.slice/systemd-networkd.service
             └─684 /lib/systemd/systemd-networkd

10月 17 09:06:41 U224d systemd-networkd[684]: ens33: Gained carrier
10月 17 09:06:43 U224d systemd-networkd[684]: ens33: Gained IPv6LL
10月 17 15:48:46 U224d systemd-networkd[684]: ens33: Gained IPv6LL
10月 17 15:49:01 U224d systemd-networkd[684]: ens33: Gained IPv6LL
10月 17 15:49:46 U224d systemd-networkd[684]: ens33: Gained IPv6LL
10月 17 15:49:51 U224d systemd-networkd[684]: ens33: Gained IPv6LL
10月 17 16:23:41 U224d systemd-networkd[684]: ens33: Re-configuring with /run/systemd/network/10-netplan-ens33.network
10月 17 16:23:41 U224d systemd-networkd[684]: ens33: DHCPv6 lease lost
10月 17 16:23:41 U224d systemd-networkd[684]: ens33: Re-configuring with /run/systemd/network/10-netplan-ens33.network
10月 17 16:23:41 U224d systemd-networkd[684]: ens33: DHCPv6 lease lost

NetworkManager仍然是启用并活跃的, systemd-networkd 由禁用变为了启用活跃状态

查看 /etc/resolv.conf

sudo less /etc/resolv.conf

# This is /run/systemd/resolve/stub-resolv.conf managed by man:systemd-resolved(8).
# Do not edit.
#
# This file might be symlinked as /etc/resolv.conf. If you're looking at
# /etc/resolv.conf and seeing this text, you have followed the symlink.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs should typically not access this file directly, but only
# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
# different way, replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0 trust-ad
search 192.168.168.2 8.8.4.4 223.6.6.6 114.114.114.114 180.76.76.76 119.29.29.29 8.8.8.8 101.226.4.6 123.125.81.6 1.1.1.1

sudo gedit /etc/netplan/01-network-manager-all.yaml

去掉renderer: NetworkManager 的注释, 启用

network:
  version: 2
  renderer: NetworkManager
  ethernets:
    ens33:
      addresses: [192.168.168.224/24]
      routes:
        - to: default # default 等效 0.0.0.0/0 等效 0/0   # could be 0/0 or 0.0.0.0/0 optionally
          via: 192.168.168.2  # 网关
      nameservers:
        addresses: # DNS的ip
         [ 192.168.168.2 , 8.8.4.4 , 223.6.6.6 , 114.114.114.114, 180.76.76.76 , 119.29.29.29 , 8.8.8.8 , 101.226.4.6, 123.125.81.6, 1.1.1.1]
        search: 
         [ 192.168.168.2 , 8.8.4.4 , 223.6.6.6 , 114.114.114.114, 180.76.76.76 , 119.29.29.29 , 8.8.8.8 , 101.226.4.6, 123.125.81.6, 1.1.1.1]

sudo netplan try

sudo netplan apply

图形界面的连接又生效了, 而且显示两个, 可以点击切换

两个网络设置都能用, 分别对应 /etc/netplan/01-network-manager-all.yaml 和 /etc/NetworkManager/system-connections/'有线连接 1.nmconnection'

切换两个网络时, /etc/resolv.conf 也相应发生改变

为方便对照, 再次修改配置

sudo vi /etc/NetworkManager/system-connections/'有线连接 1.nmconnection'

sudo nano /etc/NetworkManager/system-connections/'有线连接 1.nmconnection'

sudo gedit /etc/NetworkManager/system-connections/'有线连接 1.nmconnection'

[connection]
id=有线连接 1
uuid=fdae7e35-2f0e-3c31-8717-2b998d902f57
type=ethernet
autoconnect-priority=-999
interface-name=ens33
timestamp=1665711319

[ethernet]

[ipv4]
address1=192.168.168.112/24,192.168.168.2
dns=8.8.8.8;8.8.4.4;223.6.6.6;6.6.6.6;101.226.4.6;180.76.76.76;119.29.29.29;114.114.114.114;1.1.1.1;
ignore-auto-dns=true
method=manual

[ipv6]
addr-gen-mode=stable-privacy
method=auto

[proxy]

sudo vi /etc/netplan/01-network-manager-all.yaml

sudo nano /etc/netplan/01-network-manager-all.yaml

sudo gedit /etc/netplan/01-network-manager-all.yaml

network:
  version: 2
  renderer: NetworkManager
  ethernets:
    ens33:
      addresses: [192.168.168.224/24]
      routes:
        - to: 0.0.0.0/0   # default 等效 0.0.0.0/0    # could be 0/0 or 0.0.0.0/0 optionally
          via: 192.168.168.2  # 网关
      nameservers:
        addresses: # DNS的ip
         [223.6.6.6,114.114.114.114,180.76.76.76 , 119.29.29.29 , 8.8.8.8 , 101.226.4.6, 123.125.81.6, 1.1.1.1]
        search: 
         [ www.baidu.com , www.goole.com , www.sogou.com, hello , world,a,b,c,d,e,f,g]

sudo netplan try

sudo netplan apply

当使用 netplan-ens33 时

ip address

z@U224d:/etc/NetworkManager/system-connections$ ip a
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:4b:7d:6d brd ff:ff:ff:ff:ff:ff
    altname enp2s1
    inet 192.168.168.224/24 brd 192.168.168.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe4b:7d6d/64 scope link 
       valid_lft forever preferred_lft forever

sudo nano /etc/resolv.conf

# This is /run/systemd/resolve/stub-resolv.conf managed by man:systemd-resolved(8).
# Do not edit.
#
# This file might be symlinked as /etc/resolv.conf. If you're looking at
# /etc/resolv.conf and seeing this text, you have followed the symlink.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs should typically not access this file directly, but only
# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
# different way, replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0 trust-ad
search 1.1.1.1 www.baidu.com www.goole.com www.sogou.com hello world a b c d e f g

• /etc/resolv.conf 的 nameserver 始终都是 127.0.0.53
• /etc/resolv.conf 的 search 与 /etc/netplan/01-network-manager-all.yaml 的 search 保持一致

当切换到 有线连接1 时

ip address

z@U224d:/etc/NetworkManager/system-connections$ ip addre
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:4b:7d:6d brd ff:ff:ff:ff:ff:ff
    altname enp2s1
    inet 192.168.168.112/24 brd 192.168.168.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::6464:ad23:9a7d:3aa8/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

地址变为了 /etc/NetworkManager/system-connections/'有线连接 1.nmconnection' 设置的地址

sudo nano /etc/resolv.conf

# This is /run/systemd/resolve/stub-resolv.conf managed by man:systemd-resolved(8).
# Do not edit.
#
# This file might be symlinked as /etc/resolv.conf. If you're looking at
# /etc/resolv.conf and seeing this text, you have followed the symlink.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs should typically not access this file directly, but only
# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
# different way, replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0 trust-ad
search www.goole.com www.sogou.com hello world a b c d e f g

• /etc/resolv.conf 的 nameserver 始终都是 127.0.0.53
• /etc/resolv.conf 的 search 发生了改变, 但看不出对应关系, 网络连接是正常的

翻译其注释

这是man管理的/run/systemd/resolve/stub-resolv.conf:system -resolved(8)。

#不要编辑。

＃

#该文件可能被符号链接为/etc/resolv.conf。如果你在看

# /etc/resolv.conf和看到这段文本，您已经遵循符号链接。

＃

这是一个动态的resolv.conf文件，用于连接本地客户端到

# system -resolved的内部DNS存根解析器。此文件列出所有

#配置的搜索域。

＃

#执行“resolvectl status”命令查看上行DNS服务器的详细信息

#目前正在使用。

＃

第三方程序通常不应该直接访问该文件，而只是

通过/etc/resolv.conf中的符号链接。要管理man:resolv.conf(5)在a

#不同的方式，替换这个符号链接的静态文件或不同的符号链接。

＃

的支持模式的详细信息请参见man:system -resolved.service(8)

/etc/resolv.conf. #操作

• 不要编辑修改这个文件
• /etc/resolv.conf 是一个符号链接 , (CentOS7,9,Fedora中的这个文件不是符号链接)
• resolvectl status 可以查看DNS

摘自 systemd-resolved.service, systemd-resolved — Network Name Resolution manager

/etc/resolv.conf
Four modes of handling /etc/resolv.conf (see resolv.conf(5)) are supported:

systemd-resolved maintains the /run/systemd/resolve/stub-resolv.conf file for compatibility with traditional Linux programs. This file lists the 127.0.0.53 DNS stub (see above) as the only DNS server. It also contains a list of search domains that are in use by systemd-resolved. The list of search domains is always kept up-to-date. Note that /run/systemd/resolve/stub-resolv.conf should not be used directly by applications, but only through a symlink from /etc/resolv.conf. This file may be symlinked from /etc/resolv.conf in order to connect all local clients that bypass local DNS APIs to systemd-resolved with correct search domains settings. This mode of operation is recommended.

A static file /usr/lib/systemd/resolv.conf is provided that lists the 127.0.0.53 DNS stub (see above) as only DNS server. This file may be symlinked from /etc/resolv.conf in order to connect all local clients that bypass local DNS APIs to systemd-resolved. This file does not contain any search domains.

systemd-resolved maintains the /run/systemd/resolve/resolv.conf file for compatibility with traditional Linux programs. This file may be symlinked from /etc/resolv.conf and is always kept up-to-date, containing information about all known DNS servers. Note the file format's limitations: it does not know a concept of per-interface DNS servers and hence only contains system-wide DNS server definitions. Note that /run/systemd/resolve/resolv.conf should not be used directly by applications, but only through a symlink from /etc/resolv.conf. If this mode of operation is used local clients that bypass any local DNS API will also bypass systemd-resolved and will talk directly to the known DNS servers.

Alternatively, /etc/resolv.conf may be managed by other packages, in which case systemd-resolved will read it for DNS configuration data. In this mode of operation systemd-resolved is consumer rather than provider of this configuration file.

Note that the selected mode of operation for this file is detected fully automatically, depending on whether /etc/resolv.conf is a symlink to /run/systemd/resolve/resolv.conf or lists 127.0.0.53 as DNS server.

etc/netplan/*.yaml 中的renderer

renderer (scalar)
        Use the given networking backend for this definition.  Currently supported are networkd and NetworkManager.  This property can be specified glob‐
        ally in network:, for a device type (in e.  g.  ethernets:) or for a particular device definition.  Default is networkd.

        (Since 0.99) The renderer property has one additional acceptable value for vlan objects (i.  e.  defined in vlans:): sriov.  If a vlan is defined
        with the sriov renderer for an SR-IOV Virtual Function interface, this causes netplan to set up a hardware VLAN filter for it.  There can be only
        one defined per VF.

renderer : 呈现器,渲染器
renderer用于定义网络后端。目前支持的是networkd和NetworkManager。

此属性可以在网络中全局指定，用于设备类型（例如以太网）或特定设备定义。。默认值是networkd。

（自0.99起）renderer 属性有一个额外的可接受值用于vlan对象（即在vlans:中定义）：sriov。

如果使用sriov renderer为SR-IOV虚拟功能接口定义vlan，这会使 netplan 为其设置硬件vlan筛选器。每个VF只能定义一个。

后来知道 etc/netplan/*.yaml 中的nameservers 中的 search
search 可以翻译成 搜索域
搜索域的用途就是:当域名搜索不到时, 将域名加上搜索域设置的名称再次搜索
比如设置了 search: [ baidu.com ] 后, ping www 就能达到 ping www.baidu.com的效果

network:
  version: 2
  renderer: NetworkManager
  ethernets:
    ens33:
      addresses: [192.168.168.224/24]
      routes:
        - to: 0.0.0.0/0   # default 等效 0.0.0.0/0    # could be 0/0 or 0.0.0.0/0 optionally
          via: 192.168.168.2  # 网关
      nameservers:
        addresses: # DNS的ip
         [180.76.76.76, 8.8.4.4, 223.6.6.6, 119.29.29.29, 101.226.4.6, 123.125.81.6, 8.8.8.8 ,114.114.114.114,1.1.1.1]
        search: 
         [ baidu.com ]

Ubuntu22.04桌面版,还可以使用nmcli 和 nmtui 命令来配置网络, Server版默认不可以
对于使用 NetworkManager的系统, 还可以使用nmcli 和 nmtui 命令来配置网络
使用nmtui 可以获得命令行的图形界面

sudo nmtui

用 nmcli 配置

sudo nmcli con mod "有线连接 1" ipv4.method manual ipv4.addr '192.168.168.224/24' ipv4.gateway '192.168.168.2' ipv4.dns '192.168.168.2' ipv4.ignore-auto-dns true ipv4.dns-search 'baidu.com'

sudo nmcli con mod "netplan-ens33" ipv4.method 'manual' ipv4.addr "192.168.168.225/24" ipv4.gateway "192.168.168.2" ipv4.dns "192.168.168.2" ipv4.ignore-auto-dns "true" ipv4.dns-search "taobao.com"

nmcli connection modify 可以修改现有连接

• con 可以写成 c 到 connection 之间的字段
• mod 可以写成 m 到 modify 之间的字段

  nmcli connection modify
  nmcli connec modify
  nmcli conne modif
  nmcii conn modi
  nmcli con mod
  nmcli co mo
  nmcli c m
  nmcli c modify
  nmcli connection m
  

• ipv4. 可以接 [method, dns, dns-search, dns-options, dns-priority, addresses, gateway, routes, route-metric, route-table, routing-rules, ignore-auto-routes, ignore-auto-dns, dhcp-client-id, dhcp-iaid, dhcp-timeout, dhcp-send-hostname, dhcp-hostname, dhcp-fqdn, dhcp-hostname-flags, never-default, may-fail, required-timeout, dad-timeout, dhcp-vendor-class-identifier, dhcp-reject-servers] 。
• • ipv4.method的可选]值有 [auto, link-local, manual, shared, disabled] , ipv4.method最简可写成ipv.me
• • ipv4.addresses 设置IP地址, 最简可写成 ipv4.a, 可设置多个地址,以逗号分隔, 也可多次用 +ipv4.a
ipv4.a(ipv4.addresses)可以设置多个(,逗号分隔,可以有空格),但只能出现一次, +ipv4.a(+ipv4.addresses)可以设置多个(,逗号分隔)可以出现多次
• • 网关ipv4.g(ipv4.gateway)只能有一个, (在图形界面也只能设置一个), 如果没设置网关就不能上网,但只要有ip地址,就能让网段内其它主机访问,比如ssh连接,没有网关就是能进不能出
• • ipv4.dns不能简写,可一次设置多个, +ipv4.dns可多次设置多个
• • ipv4.dns-search可简写为ipv4.dns-s , 搜索域
• • ipv4.ignore-auto-dns 取值 true|fasle 是否跳过自动域名 , 最简只能写成ipv4.ignore-auto-d

对应图形界面

• ipv4.x前面可以加(加号或减号±), ipv4.x表示设置 +ipv4.x表示新增, -ipv4.x表示移除
  一句中只能出现一次ipv4.x,后面的ipv4.x会覆盖前面的ipv4.x
  一句中可以出现多次 +ipv4.x 和 -ipv4.x

sudo nmcli c m "netplan-ens33" ipv4.method manual ipv4.addr 192.168.168.224/24 ipv4.gateway 192.168.168.2 ipv4.dns 192.168.168.2

最好加上单引号或双引号

sudo nmcli connection modify "有线连接 1" ipv4.method 'manual' ipv4.addr "192.168.168.225/24" ipv4.gateway "192.168.168.2" ipv4.dns '192.168.168.2'

也可以分成多句

sudo nmcli c m "有线连接 1" ipv4.addr "192.168.168.224/24"
sudo nmcli connection modify "有线连接 1" ipv4.gateway "192.168.168.2"
sudo nmcli co mo "有线连接 1" ipv4.method 'manual'

自动获取ip

sudo nmcli co mo "有线连接 1" ipv4.method 'auto'

手动指定ip地址和网关,静态IP

sudo nmcli co mo "有线连接 1" ipv4.method 'manual' ipv4.addresses "192.168.168.224/24" ipv4.gateway "192.168.168.2"

手动指定的dns, 跳过自动获取dns

sudo nmcli co mo "有线连接 1" ipv4.ignore-auto-d 'true'

设置dns , 相同的dns不会重复

sudo nmcli co mo "有线连接 1" ipv4.dns "192.168.168.2 , 8.8.4.4 , 223.6.6.6 , 180.76.76.76"
sudo nmcli co mo "有线连接 1" +ipv4.dns "123.125.81.6 ,1.1.1.1,8.8.8.8,114.114.114.114"
sudo nmcli co mo "有线连接 1" +ipv4.dns "192.168.168.2 , 6.6.6.6" # 不会重复
sudo nmcli co mo "有线连接 1" -ipv4.dns "6.6.6.6"

设置搜索域

sudo nmcli co mo "有线连接 1" ipv4.dns-search 'baidu.com , google.cn , qq.com'

一句设置 method , addresses , gateway , dns , 跳过自动DNS , search

sudo nmcli c m "有线连接 1" ipv4.method 'manual' ipv4.addresses "192.168.168.224/24" ipv4.gateway "192.168.168.2" ipv4.dns "192.168.168.2 , 8.8.4.4 , 223.6.6.6 , 180.76.76.76, 123.125.81.6, 1.1.1.1,8.8.8.8,114.114.114.114" ipv4.ignore-auto-dns 'true' ipv4.dns-search 'baidu.com' ; sudo systemctl restart NetworkManager

method可写成me , addresses可写成a , gateway可写成g , dns不能简写 , dns-serarch可写成dns-s

sudo nmcli c m "有线连接 1" ipv4.me manual ipv4.a "192.168.168.224/24" ipv4.g "192.168.168.1" ipv4.dns "192.168.168.2 , 223.6.6.6 , 180.76.76.76, 123.125.81.6, 1.1.1.1,8.8.8.8,114.114.114.114,8.8.4.4" ipv4.ignore-auto-d 'true' ipv4.dns-s 'baidu.com' ; sudo systemctl restart NetworkManager

没有空格等一些特殊字符的话, 也可以不加引号, 点号不影响

sudo nmcli c m "有线连接 1" ipv4.me manual ipv4.a 192.168.168.224/24 ipv4.g 192.168.168.2 ipv4.dns 192.168.168.2,223.6.6.6,180.76.76.76,123.125.81.6,1.1.1.1,8.8.8.8,114.114.114.114,8.8.4.4 ipv4.ignore-auto-d true ipv4.dns-s baidu.com ; sudo systemctl restart NetworkManager

对于使用 NetworkManager的系统, 一般用GNOME桌面图形界面的系统都默认用NetworkManager, 如 CentOS7,8,9 , Fedora36 等 都可以使用nmcli 和 nmtui 命令来配置网络
可以用 nmcli help , nmcli c help 和 nmcli c m help 查看对应的帮助

$ nmcli help
用法：nmcli [选项] 对象 { 命令 | help }

选项
  -a, --ask                                询问缺少的参数
  -c, --colors auto|yes|no                 是否在输出中使用颜色
  -e, --escape yes|no                      转义值中的列分隔符
  -f, --fields <字段,...>|all|common       指定要输出的字段
  -g, --get-values <字段,...>|all|common   -m tabular -t -f 的快捷方式
  -h, --help                               打印此帮助
  -m, --mode tabular|multiline             输出模式
  -o, --overview                           概览模式
  -p, --pretty                             美化输出
  -s, --show-secrets                       允许显示密码
  -t, --terse                              简介输出
  -v, --version                            显示程序版本
  -w, --wait <秒数>                        设定操作完成的等待超时

对象
  g[eneral]       NetworkManager 的常规状态和操作
  n[etworking]    整体网络控制
  r[adio]         NetworkManager 无线电开关
  c[onnection]    NetworkManager 的连接
  d[evice]        NetworkManager 管理的设备
  a[gent]         NetworkManager 机密（secret）或 polkit 代理
  m[onitor]       监视 NetworkManager 更改

$ nmcli connection help
用法：nmcli connection { 命令 | help }

命令 := { show | up | down | add | modify | clone | edit | delete | monitor | reload | load | import | export }

  show [--active] [--order <排序规则>]
  show [--active] [id | uuid | path | apath] <ID> ...

  up [[id | uuid | path] <ID>] [ifname <接口名称>] [ap <BSSID>] [passwd-file <密码文件>]

  down [id | uuid | path | apath] <ID> ...

  add 常用选项 类型特定选项 从选项 IP_选项 [-- ([+|-]<设置>.<属性> <值>)+]

  modify [--temporary] [id | uuid | path] <ID> ([+|-]<设置>.<属性> <值>)+

  clone [--temporary] [id | uuid | path ] <ID> <新名称>

  edit [id | uuid | path] <ID>
  edit [type <新连接类型>] [con-name <新连接名称>]

  delete [id | uuid | path] <ID>

  monitor [id | uuid | path] <ID> ...

  reload

  load <文件名> [ <文件名>... ]

  import [--temporary] type <类型> file <要导入的文件>

$ nmcli connection modify help
用法：nmcli connection modify { 参数 | help }

参数 := [id | uuid | path] <ID> ([+|-]<设置>.<属性> <值>)+

修改连接配置集的一个或多个属性。
配置集由它的名称、UUID 或 D-Bus 路径代表。对于有多个值
的属性，可以使用 "+" 或 "-" 为属性名加前缀。
"+" 代表附加项而不是覆盖整个值。
"-"代表删除选项的项而不是整个值。

参数 := remove <设置>

从连接配置集中删除一个设置。

示例：
nmcli con mod home-wifi wifi.ssid rakosnicek
nmcli con mod em1-1 ipv4.method manual ipv4.addr "192.168.1.2/24, 10.10.1.5/8"
nmcli con mod em1-1 +ipv4.dns 8.8.4.4
nmcli con mod em1-1 -ipv4.dns 1
nmcli con mod em1-1 -ipv6.addr "abbe::cafe/56"
nmcli con mod bond0 +bond.options mii=500
nmcli con mod bond0 -bond.options downdelay
nmcli con mod em1-1 remove sriov

NetworkManager官网
NetworkManager官网—man pages

wiki.archlinux.org—NetworkManager (简体中文)
Archlinux的nmcli用例—nmcli-examples - usage examples of nmcli
Archlinux的NMCLI(1)—nmcli - command-line tool for controlling NetworkManager

nmcli connection add 可以创建新连接

ARGUMENTS := COMMON_OPTIONS TYPE_SPECIFIC_OPTIONS SLAVE_OPTIONS IP_OPTIONS [-- ([+|-]. )+]

  COMMON_OPTIONS:
                  type 
                  ifname  | "*"
                  [con-name ]
                  [autoconnect yes|no]
                  [save yes|no]
                  [master ]
                  [slave-type ]

nmcli connection add等效nmcli c a

sudo nmcli c a con-name 'ens33ConnTest001' ifname 'ens33' type ethernet ipv4.method 'manual' ipv4.addresses "192.168.168.224/24 , 192.168.168.225/24,192.168.168.226/24"  +ipv4.address '192.168.168.227/24' +ipv4.a '192.168.168.228/24' +ipv4.addre '192.168.168.229/24 , 192.168.168.230/24   ,     192.168.168.231/24'    +ipv4.addr "192.168.168.232/24" +ipv4.ad '192.168.168.233/24'  +ipv4.a 192.168.168.234/24,192.168.168.235/24 ipv4.gate 192.168.168.2  ipv4.dns 192.168.168.2,119.29.29.29,180.76.76.76,223.6.6.6,8.8.4.4,114.114.115.115 +ipv4.dns '223.5.5.5 , 8.8.8.8 , 1.1.1.1 , 114.114.114.114' +ipv4.dns 101.226.4.6,123.125.81.6 ipv4.ignore-auto-dns true ipv4.dns-search qq.com

ipv4.a(ipv4.addresses)可以设置多个(,逗号分隔,可以有空格),但只能出现一次, +ipv4.a(+ipv4.addresses)可以设置多个(,逗号分隔)可以出现多次
网关ipv4.g(ipv4.gateway)只能有一个, (在图形界面也只能设置一个)
ipv4.dns不能简写,可一次设置多个, +ipv4.dns可多次设置多个
ipv4.dns-search可简写为ipv4.dns-s , 搜索域
ipv4.ignore-auto-dns 取值 true|fasle 是否跳过自动域名 , 最简只能写成ipv4.ignore-auto-d
上面的nmcli控制台语句会在/etc/NetworkManager/system-connections/ 目录生成 con-name指定的名称加上 .nmconnection 后缀的配置文件, 如果同名文件已存在, 就会再加一个UID
上面的nmcli控制台语句生成的对应的配置文件的内容为

[connection]
id=ens33ConnTest001
uuid=47b1917a-5eea-4160-b56f-680654c338c9
type=ethernet
interface-name=ens33

[ethernet]

[ipv4]
address1=192.168.168.224/24,192.168.168.2
address2=192.168.168.225/24
address3=192.168.168.226/24
address4=192.168.168.227/24
address5=192.168.168.228/24
address6=192.168.168.229/24
address7=192.168.168.230/24
address8=192.168.168.231/24
address9=192.168.168.232/24
address10=192.168.168.233/24
address11=192.168.168.234/24
address12=192.168.168.235/24
dns=192.168.168.2;119.29.29.29;180.76.76.76;223.6.6.6;8.8.4.4;114.114.115.115;223.5.5.5;8.8.8.8;1.1.1.1;114.114.114.114;101.226.4.6;123.125.81.6;
dns-search=qq.com;
ignore-auto-dns=true
method=manual

[ipv6]
addr-gen-mode=stable-privacy
method=auto

[proxy]

netplan可以从配置文件创建连接, NetworkManager暂时不知可否从配置文件创建连接,只能从图形界面或nmtui或nmcli c a创建新连接, nmcli c load只能加载已创建连接的配置文件, 不能加载自己添加的配置文件

后来发现 NetworkManager 的 nmcli 也可以从配置文件创建新连接 , 不是用 nmcli connection load , 而是用 nmcli connection reload

nmcli connection reload 会扫描加载所有/etc/NetworkManager/system-connections/ 目录下(不包括子目录) .nmconnection 结尾的配置文件, 然后用 nmcli connection up 连接名 激活连接

*.nmconnection 必须符合 chmod 600 权限 -rw-------

root@ud224:/etc/NetworkManager/system-connections# ll /etc/NetworkManager/system-connections/
总用量 80
drwxr-xr-x 1 root root  940 10月 27 07:48  ./
drwxr-xr-x 1 root root  194 10月 27 07:35  ../
-rw------- 1 root root  344 10月 26 05:56  360电信移动铁通dns.nmconnection
-rw------- 1 root root  313 10月 26 05:58  360联通dns.nmconnection
-rw------- 1 root root  350 10月 26 04:10  阿里dns.nmconnection
-rw------- 1 root root  298 10月 26 04:34  百度dns.nmconnection
-rw------- 1 root root  301 10月 26 04:25  谷歌dns.nmconnection
-rw------- 1 root root  315 10月 26 06:13  四川联通dns.nmconnection
-rw------- 1 root root  295 10月 26 04:53  腾讯dns.nmconnection
-rw------- 1 root root  300 10月 26 06:06  微软dns.nmconnection
-rw------- 1 root root  427 10月 26 00:39 '有线连接 1.nmconnection'
-rw------- 1 root root  315 10月 26 05:37  CloudflareDNS.nmconnection
-rw------- 1 root root  311 10月 26 05:26  CNNICdns.nmconnection
-rw------- 1 root root  276 10月 26 02:14  Concise.nmconnection
-rw------- 1 root root  236 10月 26 03:42  con-name.nmconnection
-rw------- 1 root root  203 10月 26 03:45  ens33自动获取IP.nmconnection
-rw------- 1 root root  741 10月 26 01:55  ens33ConnTest001.nmconnection
-rw------- 1 root root  268 10月 26 05:01  IBMdns.nmconnection
-rw------- 1 root root  312 10月 26 06:16  OpenDNS.nmconnection
-rw------- 1 root root 1069 10月 27 07:48  t001.nmconnection
-rw------- 1 root root  729 10月 27 07:43  t002.nmconnection
-rw------- 1 root root  345 10月 27 07:33  t003.nmconnection
drwxr-xr-x 1 root root   34 10月 27 07:27  test/

添加一个简洁的,可当基础模板

sudo nmcli connection add con-name 'Concise' ifname 'ens33' type 'ethernet' ipv4.method 'manual' ipv4.addresses "192.168.168.224/24" ipv4.gateway '192.168.168.2' ipv4.dns '192.168.168.2' ipv4.ignore-auto-dns false ipv4.dns-search google.cn

con-name, ifname , type 没法简写 , 区分大小写

可以添加几个连接可用于做试验,或者方便快速切换

sudo nmcli c a con-name 'con-name' ifname 'ens33' type 'EtherneT' ipv4.me 'manual' ipv4.a 192.168.168.224/24 ipv4.g 192.168.168.2

EtHeRnEt 不区分大小写 , 到配置文件会变为小写 ethernet

sudo nmcli c a con-name 'ens33自动获取IP' ifname 'ens33' type EtHeRnEt ipv4.me auto

ipv4.xxx 也不区分大小写, 到配置文件都变小写

sudo nmcli c a con-name '阿里dns' ifname ens33 type ethernet IpV4.me ManuaL iPV4.A 192.168.168.224/24 IPv4.g 192.168.168.2 ipv4.ignore-auto-dns true ipv4.dns 223.6.6.6,223.5.5.5

sudo nmcli c m '阿里dns' iPv4.iGnore-aUto-dNs true Ipv4.dnS 223.6.6.6,223.5.5.5 iPv4.dNs-SeArCh alibaba.com,aliyun.com,taobao.com

con-name, ifname , type 没法简写 , 而且区分大小写

sudo nmcli c a con-name '谷歌dns' ifname ens33 type ETHERnet iPV4.mE mANuAl IpV4.aDDr 192.168.168.224/24 ipV4.GAte 192.168.168.2 IpV4.IgNorE-AUto-DnS TruE ipV4.dNS 8.8.4.4,8.8.8.8 ipV4.DnS-sEaRcH google.cn

sudo nmcli c a con-name 百度dns ifname ens33 type ethernet ipv4.me manual ipv4.a 192.168.168.224/24 ipv4.g 192.168.168.2 ipv4.ignore-auto-dns true ipv4.dns 180.76.76.76 ipv4.dns-search baidu.com

单引号

sudo nmcli c a con-name '腾讯dns' ifname 'ens33' type 'ethernet' ipv4.me 'manual' ipv4.a '192.168.168.224/24' ipv4.g '192.168.168.2' ipv4.ignore-auto-dns 'true' ipv4.dns '119.29.29.29' ipv4.dns-search 'qq.com'

双引号

sudo nmcli c a con-name "114dns" ifname "ens33" type "ethernet" ipv4.me "manual" ipv4.a "192.168.168.224/24" ipv4.g "192.168.168.2" ipv4.ignore-auto-dns "true" ipv4.dns "114.114.114.114,114.114.115.115"

大写

sudo nmcli c a con-name 'IBMdns' ifname 'ens33' type 'ethernet' IPV4.ME manual IPV4.A 192.168.168.224/24 IPV4.G 192.168.168.2 IPV4.IGNORE-AUTO-DNS true IPV4.DNS '9.9.9.9'

全名大写

sudo nmcli c a con-name 'CNNICdns' ifname 'ens33' type 'ethernet' IPV4.METHOD 'manual' IPV4.ADDRESSES 192.168.168.224/24 IPV4.GATEWAY 192.168.168.2 IPV4.IGNORE-AUTO-DNS 'true' IPV4.DNS '1.2.4.8,210.2.4.8' IPV4.DNS-SEARCH 'baidu.com,google.cn'

全名小写

sudo nmcli c a con-name 'CloudflareDNS' ifname 'ens33' type 'ethernet' ipv4.method 'manual' ipv4.addresses '192.168.168.224/24' ipv4.gateway '192.168.168.2' ipv4.ignore-auto-dns 'true' ipv4.dns '1.1.1.1,1.0.0.1' ipv4.dns-search 'baidu.com,google.cn'

sudo nmcli c a con-name "360电信移动铁通dns" ifname "ens33" type "ethernet" ipv4.method "manual" ipv4.addresses "192.168.168.224/24" ipv4.gateway "192.168.168.2" ipv4.ignore-auto-dns "true" ipv4.dns "101.226.4.6 , 218.30.118.6" ipv4.dns-search "360.com"

sudo nmcli c a con-name 360联通dns ifname ens33 type ethernet ipv4.method manual ipv4.addresses 192.168.168.224/24 ipv4.gateway 192.168.168.2 ipv4.ignore-auto-dns true ipv4.dns 123.125.81.6,140.207.198.6 ipv4.dns-search "360.com"

sudo nmcli c a con-name 微软dns ifname ens33 type ethernet ipv4.me manual ipv4.a 192.168.168.224/24 ipv4.g 192.168.168.2 ipv4.ignore-auto-dns true ipv4.dns 4.2.2.1,4.2.2.2 ipv4.dns-s bing.com

sudo nmcli c a con-name OpenDNS ifname ens33 type ethernet ipv4.me manual ipv4.a 192.168.168.224/24 ipv4.g 192.168.168.2 ipv4.ignore-auto-dns true ipv4.dns 208.67.222.222,208.67.220.220 ipv4.dns-s bing.com

修改为手动DNS

sudo nmcli c m 'ens33ConnTest001' ipv4.ignore-auto-dns true

修改自动DNS

sudo nmcli c m 'ens33ConnTest001' ipv4.ignore-auto-dns false

resolvectl 命令可以查看 dns

另外, Ubuntu22,desktop和server版, 默认都没有 /etc/network/interfaces文件 , 没有networking服务

z@U224d:/$ sudo cat /etc/network/interfaces
cat: /etc/network/interfaces: 没有那个文件或目录

root@ud224:/etc/NetworkManager/system-connections# systemctl status networking
Unit networking.service could not be found.

DNS默认用端口 53

resolvectl 命令可以查看 dns