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[root@netkiller ~]# hostnamectl
Static hostname: netkiller.localdomain
Icon name: computer-desktop
Chassis: desktop
Machine ID: 072e88a0fdd2447296554f3cd5129076
Boot ID: a978056f50544355abd723b328a89b6f
Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-229.el7.x86_64
Architecture: x86_64
设置 hostname
[root@netkiller ~]# hostnamectl set-hostname master
如果不生效执行下面命令
systemctl restart systemd-hostnamed
# yum install NetworkManager-tui # nmtui
┌─┤ NetworkManager TUI ├──┐
│ │
│ Please select an option │
│ │
│ Edit a connection │
│ Activate a connection │
│ Set system hostname │
│ │
│ Quit │
│ │
│ <OK> │
│ │
└─────────────────────────┘
# nmtui # nmtui edit eno16777736 # nmtui connect eno1677773
nmcli 是 nmtui 命令行版本。
nmclinmcli 有 8 个参数： help 提供有关 nmcli 命令和使用方法的帮助信息 general 返回 NetworkManager 的状态和总体配置信息 networking 提供命令来查询某个网络连接的状态和启动、禁用连接的功能 radio 提供命令来查询某个 WiFi 网络连接的状态和启动、禁用连接的功能 monitor 提供命令来监控 NetworkManager 的活动并观察网络连接的状态改变 connection 提供命令来启用或禁用网络接口、添加新的连接、删除已有连接等功能 device 主要被用于更改与某个设备（例如接口名称）相关联的连接参数或者使用一个已有的连接来连接设备 secret 注册 nmcli 来作为一个 NetworkManager 的秘密代理，用以监听秘密信息。这个子命令很少会被用到，因为当连接到网络时，nmcli 会自动做这些事
[root@localhost ~]# nmcli general STATE CONNECTIVITY WIFI-HW WIFI WWAN-HW WWAN connected full enabled enabled enabled enabled
设置 ONBOOT=yes 启动系统激活网卡
[root@netkiller ~]# nmcli connection NAME UUID TYPE DEVICE enp2s0 e80cafe2-abbc-4939-8c66-ca89d3a651f0 ethernet enp2s0 [root@netkiller ~]# nmcli connection modify enp2s0 connection.autoconnect yes
[root@localhost ~]# nmcli connection show NAME UUID TYPE DEVICE enp8s0 ff04c285-bca6-48a3-b769-4871897bca7b ethernet enp8s0 docker0 b5bcd58d-b826-4bee-b100-4ae6976d6f76 bridge docker0 The Peninsula 3-6 dc0d8214-3589-4044-9a05-8b5f50c3de1f wifi --
显示激活状态的接口
[root@localhost ~]# nmcli connection show NAME UUID TYPE DEVICE enp8s0 ff04c285-bca6-48a3-b769-4871897bca7b ethernet enp8s0 The Peninsula 3-6 dc0d8214-3589-4044-9a05-8b5f50c3de1f wifi -- [root@localhost ~]# nmcli connection show --active NAME UUID TYPE DEVICE enp8s0 ff04c285-bca6-48a3-b769-4871897bca7b ethernet enp8s0
$ nmcli connection modify enp8s0 ipv4.address 192.168.4.26/24 $ nmcli connection modify enp8s0 ipv4.method manual
DHCP
$ nmcli connection modify enp8s0 ipv4.method auto
[root@localhost ~]# nmcli connection modify enp8s0 ipv4.address 192.168.3.26/24
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-enp8s0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp8s0
UUID=ff04c285-bca6-48a3-b769-4871897bca7b
DEVICE=enp8s0
ONBOOT=yes
IPADDR=192.168.3.26
PREFIX=24
[root@localhost ~]# ip addr show enp8s0:
2: enp8s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:26:9e:6f:bb:23 brd ff:ff:ff:ff:ff:ff
inet 192.168.3.6/24 brd 192.168.3.255 scope global dynamic noprefixroute enp8s0
valid_lft 601424sec preferred_lft 601424sec
inet6 fe80::82e7:1911:232:d93/64 scope link noprefixroute
valid_lft forever preferred_lft forever
实操举例
[root@localhost ~]# nmcli connection show NAME UUID TYPE DEVICE enp2s0 56d81f4d-ebad-4f3d-8c07-ccb4285b0108 ethernet enp2s0 br-0e0f0a52c09e 70620a80-6bf8-443a-8b38-bc8796517eac bridge br-0e0f0a52c09e docker0 290e3b83-1d88-4aa5-b8f4-ce92e0833a57 bridge docker0 [root@localhost ~]# nmcli connection modify enp2s0 ipv4.address 192.168.30.13/24
重启网络使配置生效
[root@localhost ~]# nmcli device reapply enp2s0 # 下面方法同样可以重启 nmcli con reload && nmcli con up ens33
在物理服务器上链接键盘和显示器的情况下使用，否则执行 nmcli networking off 后将无法再链接服务器。
nmcli networking off && nmcli networking on
[root@localhost ~]# nmcli connection down docker0 Connection 'docker0' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/2) [root@localhost ~]# nmcli connection show NAME UUID TYPE DEVICE enp8s0 ff04c285-bca6-48a3-b769-4871897bca7b ethernet enp8s0 The Peninsula 6-3C dc0d8214-3589-4044-9a05-8b5f50c3de1f wifi --
[root@localhost ~]# nmcli connection edit enp8s0
print 显示配置信息
nmcli> print
===============================================================================
Connection profile details (enp8s0)
===============================================================================
connection.id: enp8s0
connection.uuid: ff04c285-bca6-48a3-b769-4871897bca7b
connection.stable-id: --
connection.type: 802-3-ethernet
connection.interface-name: enp8s0
connection.autoconnect: yes
connection.autoconnect-priority: 0
connection.autoconnect-retries: -1 (default)
connection.multi-connect: 0 (default)
connection.auth-retries: -1
connection.timestamp: 1599726610
connection.read-only: no
connection.permissions: --
connection.zone: --
connection.master: --
connection.slave-type: --
connection.autoconnect-slaves: -1 (default)
connection.secondaries: --
connection.gateway-ping-timeout: 0
connection.metered: unknown
connection.lldp: default
connection.mdns: -1 (default)
connection.llmnr: -1 (default)
connection.wait-device-timeout: -1
-------------------------------------------------------------------------------
802-3-ethernet.port: --
802-3-ethernet.speed: 0
802-3-ethernet.duplex: --
802-3-ethernet.auto-negotiate: no
802-3-ethernet.mac-address: --
802-3-ethernet.cloned-mac-address: --
802-3-ethernet.generate-mac-address-mask:--
802-3-ethernet.mac-address-blacklist: --
802-3-ethernet.mtu: auto
802-3-ethernet.s390-subchannels: --
802-3-ethernet.s390-nettype: --
802-3-ethernet.s390-options: --
802-3-ethernet.wake-on-lan: default
802-3-ethernet.wake-on-lan-password: --
-------------------------------------------------------------------------------
ipv4.method: auto
ipv4.dns: --
ipv4.dns-search: --
ipv4.dns-options: --
ipv4.dns-priority: 0
ipv4.addresses: 192.168.3.26/24
ipv4.gateway: --
ipv4.routes: --
ipv4.route-metric: -1
ipv4.route-table: 0 (unspec)
ipv4.routing-rules: --
ipv4.ignore-auto-routes: no
ipv4.ignore-auto-dns: no
ipv4.dhcp-client-id: --
ipv4.dhcp-iaid: --
ipv4.dhcp-timeout: 0 (default)
ipv4.dhcp-send-hostname: yes
ipv4.dhcp-hostname: --
ipv4.dhcp-fqdn: --
ipv4.dhcp-hostname-flags: 0x0 (none)
ipv4.never-default: no
ipv4.may-fail: yes
ipv4.dad-timeout: -1 (default)
-------------------------------------------------------------------------------
ipv6.method: auto
ipv6.dns: --
ipv6.dns-search: --
ipv6.dns-options: --
ipv6.dns-priority: 0
ipv6.addresses: --
ipv6.gateway: --
ipv6.routes: --
ipv6.route-metric: -1
ipv6.route-table: 0 (unspec)
ipv6.routing-rules: --
ipv6.ignore-auto-routes: no
ipv6.ignore-auto-dns: no
ipv6.never-default: no
ipv6.may-fail: yes
ipv6.ip6-privacy: -1 (unknown)
ipv6.addr-gen-mode: stable-privacy
ipv6.ra-timeout: 0 (default)
ipv6.dhcp-duid: --
ipv6.dhcp-iaid: --
ipv6.dhcp-timeout: 0 (default)
ipv6.dhcp-send-hostname: yes
ipv6.dhcp-hostname: --
ipv6.dhcp-hostname-flags: 0x0 (none)
ipv6.token: --
-------------------------------------------------------------------------------
proxy.method: none
proxy.browser-only: no
proxy.pac-url: --
proxy.pac-script: --
-------------------------------------------------------------------------------
nmcli>
设置 DHCP
nmcli> goto ipv4 You may edit the following properties: 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, dad-timeout nmcli ipv4> set method auto Do you also want to clear 'ipv4.addresses'? [yes]: nmcli ipv4> save Connection 'enp8s0' (ff04c285-bca6-48a3-b769-4871897bca7b) successfully updated. nmcli ipv4> quit
查看接口
[root@stage ~]# ifconfig
br-8e039a79ebcc: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:13:08:b4:52 txqueuelen 0 (Ethernet)
RX packets 42334 bytes 7746029 (7.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 29017 bytes 11857277 (11.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
删除网桥
[root@stage ~]# nmcli connection delete br-8e039a79ebcc Connection 'br-8e039a79ebcc' (d1a9382e-221e-4e5e-a97e-a098147a2f15) successfully deleted.
sudo nmcli dev wifi connect netkiller password ******** ifname wlp1s0 sudo nmcli device
运行命令后，会在/etc/NetworkManager/system-connections目录下看到一个名为“netkiller.nmconnection”的文件
--ask 询问密码
sudo nmcli --ask dev wifi connect netkiller Password: Device 'wlp2s0' successfully activated with 'f74121b-3245-48a2-ae25-1b6f789243984'.
[root@localhost ~]# nmcli device status DEVICE TYPE STATE CONNECTION enp8s0 ethernet connected enp8s0 docker0 bridge unmanaged -- lo loopback unmanaged -- wlp5s0 wifi unmanaged --
网卡设备详细信息
[root@localhost ~]# nmcli device show enp8s0 GENERAL.DEVICE: enp8s0 GENERAL.TYPE: ethernet GENERAL.HWADDR: 00:26:9E:6F:BB:23 GENERAL.MTU: 1500 GENERAL.STATE: 100 (connected) GENERAL.CONNECTION: enp8s0 GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/1 WIRED-PROPERTIES.CARRIER: on IP4.ADDRESS[1]: 192.168.3.6/24 IP4.GATEWAY: 192.168.3.1 IP4.ROUTE[1]: dst = 0.0.0.0/0, nh = 192.168.3.1, mt = 100 IP4.ROUTE[2]: dst = 192.168.3.0/24, nh = 0.0.0.0, mt = 100 IP4.DNS[1]: 192.168.3.1 IP4.DOMAIN[1]: home IP6.ADDRESS[1]: fe80::82e7:1911:232:d93/64 IP6.GATEWAY: -- IP6.ROUTE[1]: dst = fe80::/64, nh = ::, mt = 100 IP6.ROUTE[2]: dst = ff00::/8, nh = ::, mt = 256, table=255