• ifconfig 查看所有网卡的配置信息
    • if config xxx 查看xxx网卡的配置信息 ```bash

      查看所有网卡的配置信息

      [root@myserver ~]# ifconfig ens33: flags=4163 mtu 1500 inet 192.168.189.204 netmask 255.255.255.0 broadcast 192.168.189.255 inet6 fe80::3a1c:3df2:d6f6:2388 prefixlen 64 scopeid 0x20 ether 00:0c:29:94:e6:0a txqueuelen 1000 (Ethernet) RX packets 7049 bytes 9915534 (9.4 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1298 bytes 97701 (95.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10 loop txqueuelen 1000 (Local Loopback) RX packets 4 bytes 240 (240.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 4 bytes 240 (240.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

virbr0: flags=4099 mtu 1500 inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 ether 52:54:00:50:1b:f1 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

查看ens33网卡的配置信息

[root@myserver ~]# ifconfig ens33 ens33: flags=4163 mtu 1500 inet 192.168.189.204 netmask 255.255.255.0 broadcast 192.168.189.255 inet6 fe80::3a1c:3df2:d6f6:2388 prefixlen 64 scopeid 0x20 ether 00:0c:29:94:e6:0a txqueuelen 1000 (Ethernet) RX packets 7053 bytes 9915774 (9.4 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1298 bytes 97701 (95.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

  2. - ip addr   查看所有网卡的配置信息
  3.    - ip addr show xxx   查看xxx网卡的配置信息
  4. ```bash
  5. # 查看所有网卡的配置信息
  6. [root@myserver ~]# ip addr
  7. 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
  8.     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
  9.     inet 127.0.0.1/8 scope host lo
  10.        valid_lft forever preferred_lft forever
  11.     inet6 ::1/128 scope host 
  12.        valid_lft forever preferred_lft forever
  13. 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
  14.     link/ether 00:0c:29:94:e6:0a brd ff:ff:ff:ff:ff:ff
  15.     inet 192.168.189.204/24 brd 192.168.189.255 scope global dynamic noprefixroute ens33
  16.        valid_lft 1330sec preferred_lft 1330sec
  17.     inet6 fe80::3a1c:3df2:d6f6:2388/64 scope link noprefixroute 
  18.        valid_lft forever preferred_lft forever
  19. 3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
  20.     link/ether 52:54:00:50:1b:f1 brd ff:ff:ff:ff:ff:ff
  21.     inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
  22.        valid_lft forever preferred_lft forever
  23. 4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
  24.     link/ether 52:54:00:50:1b:f1 brd ff:ff:ff:ff:ff:ff
  26. # 查看ens3网卡的配置信息
  27. [root@myserver ~]# ip addr show ens33
  28. 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
  29.     link/ether 00:0c:29:94:e6:0a brd ff:ff:ff:ff:ff:ff
  30.     inet 192.168.189.204/24 brd 192.168.189.255 scope global dynamic noprefixroute ens33
  31.        valid_lft 1667sec preferred_lft 1667sec
  32.     inet6 fe80::3a1c:3df2:d6f6:2388/64 scope link noprefixroute 
  33.        valid_lft forever preferred_lft forever
  • /etc/sysconfig/network-scripts 所有网卡配置文件存放在此文件夹下
    • ens33 <—> ifcfg-ens33 ```bash [root@myserver ~]# cd /etc/sysconfig/network-scripts [root@myserver network-scripts]# ls ifcfg-ens33

查看网卡配置文件内容

[root@myserver network-scripts]# cat ifcfg-ens33 TYPE=”Ethernet” # 设备类型 PROXY_METHOD=”none” BROWSER_ONLY=”no” BOOTPROTO=”dhcp” # 地址分配模式，none启动时不使用任何协议，static启动时使用静态地址协议，dhcp启动时使用dhcp协议 DEFROUTE=”yes” # 默认路由 IPV4_FAILURE_FATAL=”no” IPV6INIT=”yes” IPV6_AUTOCONF=”yes” IPV6_DEFROUTE=”yes” IPV6_FAILURE_FATAL=”no” IPV6_ADDR_GEN_MODE=”stable-privacy” NAME=”ens33” # 网卡名称 UUID=”8b859a84-ac58-4b09-bec4-fd660a92ce00” # 网卡UUID，全球唯一 DEVICE=”ens33” # 设备名称 ONBOOT=”yes” # yes为开机自动打开网卡

IPADDR ip地址，none模式和static模式需要自己填写

NETMASK 子网掩码，none模式和static模式需要自己填写

GATEWAY 网关地址，none模式和static模式需要自己填写

  2. - mncli   网络管理工具
  3.    - nmcli connection   查看所有网络连接
  4.    - nmcli connection show xxx   查看xxx接口信息
  5.    - nmcli connection show --active   查看所有活动连接
  6.    - nmcli connection delete xxx   删除xxx网卡连接
  7.    - nmcli connection modify xxx ipv4.method manual   将xxx网卡的ip地址分配方式改为手动
  8.    - nmcli connection modify xxx ipv4.addresses xxx.xxx.xxx.xxx/xx   设置xxx网卡的ipv4地址
  9.    - nmcli connection modify xxx +ipv4.addresses xxx.xxx.xxx.xxx/xx   给xxx网卡添加一个ipv4地址
  10.    - nmcli connection modify xxx -ipv4.addresses xxx.xxx.xxx.xxx/xx   将xxx网卡的一个ipv4地址删除
  11.    - nmcli connection modify xxx ipv4.gateway xxx.xxx.xxx.xxx   设置xxx网卡的网关
  12.    - nmcli connection modify xxx ipv4.dns xxx.xxx.xxx.xxx   设置xxx网卡的dns
  13.    - nmcli connection modify xxx +ipv4.dns xxx.xxx.xxx.xxx   给xxx网卡添加一个dns
  14.    - nmcli connection modify xxx -ipv4.dns xxx.xxx.xxx.xxx   删除xxx网卡的某个dns
  15.    - nmcli connection reload   重载网络配置
  16.    - nmcli connection up xxx   启用xxx网络接口
  17.    - nmcli connection down xxx   停用xxx网络接口
  19. ```bash
  20. [root@myserver ~]# cd /etc/sysconfig/network-scripts/
  21. [root@myserver network-scripts]# ls
  22. ifcfg-ens33  ifcfg-ens37
  24. # 查看当前所有网卡连接
  25. [root@myserver network-scripts]# nmcli connection
  26. NAME        UUID                                  TYPE      DEVICE     
  27. ens37       8b859a84-ac58-4b09-bec4-fd660a92ce00  ethernet  ens37      
  28. ens33       bca0a06d-c42d-4e14-8f23-1ab7cce5f548  ethernet  ens33      
  29. virbr0      0fe63665-645a-4f21-9d75-7032acb6deb8  bridge    virbr0     
  30. virbr0-nic  89e6029b-26a4-445a-93d3-678e0883e783  tun       virbr0-nic 
  32. # 将ens37网卡连接关闭，其地址分配方式为静态地址分配
  33. [root@myserver network-scripts]# nmcli connection down ens37
  34. Connection 'ens37' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)
  36. # 检查ens37是否关闭
  37. [root@myserver network-scripts]# nmcli connection
  38. NAME        UUID                                  TYPE      DEVICE     
  39. ens33       bca0a06d-c42d-4e14-8f23-1ab7cce5f548  ethernet  ens33      
  40. virbr0      0fe63665-645a-4f21-9d75-7032acb6deb8  bridge    virbr0     
  41. virbr0-nic  89e6029b-26a4-445a-93d3-678e0883e783  tun       virbr0-nic 
  42. ens37       8b859a84-ac58-4b09-bec4-fd660a92ce00  ethernet  --         
  44. # 关闭ens33网卡连接，其地址分配方式为dhcp协议分配
  45. [root@myserver network-scripts]# nmcli connection down ens33
  46. Connection 'ens33' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/8)
  48. # 查看当前所有网卡连接
  49. [root@myserver network-scripts]# nmcli connection 
  50. NAME        UUID                                  TYPE      DEVICE     
  51. virbr0      0fe63665-645a-4f21-9d75-7032acb6deb8  bridge    virbr0     
  52. virbr0-nic  89e6029b-26a4-445a-93d3-678e0883e783  tun       virbr0-nic 
  53. ens37       8b859a84-ac58-4b09-bec4-fd660a92ce00  ethernet  --         
  55. # 查看所有活动连接
  56. [root@myserver network-scripts]# nmcli connection show --active 
  57. NAME        UUID                                  TYPE    DEVICE     
  58. virbr0      0fe63665-645a-4f21-9d75-7032acb6deb8  bridge  virbr0     
  59. virbr0-nic  89e6029b-26a4-445a-93d3-678e0883e783  tun     virbr0-nic 
  61. # 启用ens37网卡连接
  62. [root@myserver network-scripts]# nmcli connection up ens37 
  63. Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
  65. # 检测ens37连接是否启用
  66. [root@myserver network-scripts]# nmcli connection show --active 
  67. NAME        UUID                                  TYPE      DEVICE     
  68. ens37       8b859a84-ac58-4b09-bec4-fd660a92ce00  ethernet  ens37      
  69. virbr0      0fe63665-645a-4f21-9d75-7032acb6deb8  bridge    virbr0     
  70. virbr0-nic  89e6029b-26a4-445a-93d3-678e0883e783  tun       virbr0-nic 
  72. # 查看ens37连接详细信息
  73. [root@myserver network-scripts]# nmcli connection show ens37 
  74. connection.id:                          ens37
  75. connection.uuid:                        8b859a84-ac58-4b09-bec4-fd660a92ce00
  76. connection.stable-id:                   --
  77. connection.type:                        802-3-ethernet
  78. connection.interface-name:              ens37
  79. connection.autoconnect:                 yes
  80. ......
  82. # 查看ens37网卡配置
  83. [root@myserver network-scripts]# cat ifcfg-ens37
  84. TYPE=Ethernet
  85. PROXY_METHOD=none
  86. BROWSER_ONLY=no
  87. BOOTPROTO="static"
  88. DEFROUTE=yes
  89. IPV4_FAILURE_FATAL=no
  90. IPV6INIT=yes
  91. IPV6_AUTOCONF=yes
  92. IPV6_DEFROUTE=yes
  93. IPV6_FAILURE_FATAL=no
  94. IPV6_ADDR_GEN_MODE=stable-privacy
  95. NAME=ens37
  96. UUID=8b859a84-ac58-4b09-bec4-fd660a92ce00
  97. DEVICE=ens37
  98. ONBOOT=yes
  99. IPADDR=192.168.189.205
  100. NETMASK=255.255.255.0
  101. GATEWAY=192.168.189.1
  102. PREFIX=24
  104. # 将ens37的ipv4地址设置为192.168.189.188/24
  105. [root@myserver network-scripts]# nmcli connection modify ens37 ipv4.addresses 192.168.189.188/24
  107. # 查看是否设置成功
  108. [root@myserver network-scripts]# cat ifcfg-ens37
  109. TYPE=Ethernet
  110. PROXY_METHOD=none
  111. BROWSER_ONLY=no
  112. BOOTPROTO="static"
  113. DEFROUTE=yes
  114. IPV4_FAILURE_FATAL=no
  115. IPV6INIT=yes
  116. IPV6_AUTOCONF=yes
  117. IPV6_DEFROUTE=yes
  118. IPV6_FAILURE_FATAL=no
  119. IPV6_ADDR_GEN_MODE=stable-privacy
  120. NAME=ens37
  121. UUID=8b859a84-ac58-4b09-bec4-fd660a92ce00
  122. DEVICE=ens37
  123. ONBOOT=yes
  124. IPADDR=192.168.189.188
  125. NETMASK=255.255.255.0
  126. GATEWAY=192.168.189.1
  127. PREFIX=24
  129. # 查看当前ens37网卡信息
  130. [root@myserver network-scripts]# ifconfig ens37
  131. ens37: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
  132.         inet 192.168.189.205  netmask 255.255.255.0  broadcast 192.168.189.255
  133.         inet6 fe80::b256:4ac3:a014:b8ff  prefixlen 64  scopeid 0x20<link>
  134.         ether 00:0c:29:94:e6:14  txqueuelen 1000  (Ethernet)
  135.         RX packets 372  bytes 30316 (29.6 KiB)
  136.         RX errors 0  dropped 0  overruns 0  frame 0
  137.         TX packets 187  bytes 18628 (18.1 KiB)
  138.         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
  140. # 重载网络配置
  141. [root@myserver network-scripts]# nmcli connection reload
  143. # 重新连接ens37网卡
  144. [root@myserver network-scripts]# nmcli connection up ens37
  145. Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)
  147. # 检查ipv4地址是否更改成功
  148. [root@myserver network-scripts]# ifconfig ens37
  149. ens37: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
  150.         inet 192.168.189.188  netmask 255.255.255.0  broadcast 192.168.189.255
  151.         inet6 fe80::b256:4ac3:a014:b8ff  prefixlen 64  scopeid 0x20<link>
  152.         ether 00:0c:29:94:e6:14  txqueuelen 1000  (Ethernet)
  153.         RX packets 400  bytes 32038 (31.2 KiB)
  154.         RX errors 0  dropped 0  overruns 0  frame 0
  155.         TX packets 219  bytes 22450 (21.9 KiB)
  156.         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0