联系：QQ(5163721)
标题：Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列-7-网络管理之修改IP地址
作者：Lunar©版权所有[文章允许转载,但必须以链接方式注明源地址,否则追究法律责任.]
首先，还是确认NetworkManager服务已经启动（不启动NetworkManager也可以配置IP和connect等等）：
[root@lunar1 ~]# systemctl status NetworkManager
● NetworkManager.service - Network Manager
Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
Active: active (running) since 六 2016-01-16 06:38:43 CST; 36min ago
Main PID: 758 (NetworkManager)
CGroup: /system.slice/NetworkManager.service
└─758 /usr/sbin/NetworkManager --no-daemon
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): device state change: failed -> disconnected (reason 'none') [120 30 0]
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> Auto-activating connection 'enp0s9'.
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): Activation: starting connection 'enp0s9' (5e43be5e-5a8c-4f33-bdd1-dfdce55cec0d)
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): device state change: disconnected -> prepare (reason 'none') [30 40 0]
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): device state change: prepare -> config (reason 'none') [40 50 0]
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): device state change: config -> ip-config (reason 'none') [50 70 0]
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): device state change: ip-config -> ip-check (reason 'none') [70 80 0]
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): device state change: ip-check -> secondaries (reason 'none') [80 90 0]
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): device state change: secondaries -> activated (reason 'none') [90 100 0]
1月 16 07:13:45 lunar1 NetworkManager[758]: <info> (enp0s9): Activation: successful, device activated.
[root@lunar1 ~]#
nmtui的配置和修改会自动更新/etc/sysconfig/network-scripts/下面相关的配置文件：
比如，我们使用nmtui将enp0s9的IP地址修改为192.168.209.15
这时，我们看到，nmtui已经修改了/etc/sysconfig/network-scripts/ifcfg-enp0s9的内容：
[root@lunar1 ~]# ll /etc/sysconfig/network-scripts/ifcfg* -rw-r--r--. 1 root root 319 1月 16 03:08 /etc/sysconfig/network-scripts/ifcfg-enp0s3 -rw-r--r--. 1 root root 319 1月 16 03:08 /etc/sysconfig/network-scripts/ifcfg-enp0s8 -rw-r--r--. 1 root root 315 1月 16 07:18 /etc/sysconfig/network-scripts/ifcfg-enp0s9 -rw-r--r--. 1 root root 254 9月 16 19:51 /etc/sysconfig/network-scripts/ifcfg-lo [root@lunar1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-enp0s9 HWADDR=08:00:27:A8:83:CF TYPE=Ethernet BOOTPROTO=none DEFROUTE=yes IPV4_FAILURE_FATAL=no IPV6INIT=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=no IPV6_FAILURE_FATAL=no NAME=enp0s9 UUID=5e43be5e-5a8c-4f33-bdd1-dfdce55cec0d ONBOOT=yes IPADDR=192.168.209.15 PREFIX=24 GATEWAY=192.168.209.1 IPV6_PEERDNS=yes IPV6_PEERROUTES=yes [root@lunar1 ~]#
但是，此时IP地址还没有修改：
[root@lunar1 ~]# ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.56.11 netmask 255.255.255.0 broadcast 192.168.56.255
inet6 fe80::a00:27ff:feee:cd8d prefixlen 64 scopeid 0x20<link>
ether 08:00:27:ee:cd:8d txqueuelen 1000 (Ethernet)
RX packets 928 bytes 75822 (74.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 573 bytes 183191 (178.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.60.11 netmask 255.255.255.0 broadcast 192.168.60.255
inet6 fe80::a00:27ff:fe42:fb8 prefixlen 64 scopeid 0x20<link>
ether 08:00:27:42:0f:b8 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 27 bytes 3989 (3.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s9: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.209.11 netmask 255.255.255.0 broadcast 192.168.209.255
inet6 fe80::a00:27ff:fea8:83cf prefixlen 64 scopeid 0x20<link>
ether 08:00:27:a8:83:cf txqueuelen 1000 (Ethernet)
RX packets 6 bytes 416 (416.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 295 bytes 51719 (50.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 0 (Local Loopback)
RX packets 660 bytes 53540 (52.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 660 bytes 53540 (52.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@lunar1 ~]#
我们查看一下名称为enp0s9的网络设备：
[root@lunar1 ~]# nmcli dev show enp0s9 GENERAL.设备: enp0s9 GENERAL.类型: ethernet GENERAL.硬盘: 08:00:27:A8:83:CF GENERAL.MTU: 1500 GENERAL.状态: 100 (连接的) GENERAL.CONNECTION: enp0s9 GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/24 WIRED-PROPERTIES.容器: 开 IP4.地址[1]: 192.168.209.11/24 IP4.网关: 192.168.209.1 IP6.地址[1]: fe80::a00:27ff:fea8:83cf/64 IP6.网关: [root@lunar1 ~]#
看一下当前所有的网络连接：
[root@lunar1 ~]# nmcli conn show 名称 UUID 类型 设备 enp0s9 5e43be5e-5a8c-4f33-bdd1-dfdce55cec0d 802-3-ethernet enp0s9 enp0s8 ba5021c5-727b-4b19-b6eb-c77892fb40b6 802-3-ethernet enp0s8 enp0s3 3e33deb2-5f53-4850-a424-76042c27b419 802-3-ethernet enp0s3 [root@lunar1 ~]#
修改IP后，要使修改后的连接生效，需要重新加载配置文件：
[root@lunar1 ~]# nmcli con load /etc/sysconfig/network-scripts/ifcfg-enp0s9 [root@lunar1 ~]#
然后重新连接设备enp0s9：
[root@lunar1 ~]# nmcli dev connect enp0s9 Device 'enp0s9' successfully activated with '5e43be5e-5a8c-4f33-bdd1-dfdce55cec0d'. [root@lunar1 ~]#
现在IP就修改好了，太方便了：
[root@lunar1 ~]# ifconfig enp0s9
enp0s9: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.209.15 netmask 255.255.255.0 broadcast 192.168.209.255
inet6 fe80::a00:27ff:fea8:83cf prefixlen 64 scopeid 0x20<link>
ether 08:00:27:a8:83:cf txqueuelen 1000 (Ethernet)
RX packets 6 bytes 416 (416.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 323 bytes 55802 (54.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@lunar1 ~]#
[root@lunar1 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
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: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:ee:cd:8d brd ff:ff:ff:ff:ff:ff
inet 192.168.56.11/24 brd 192.168.56.255 scope global enp0s3
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:feee:cd8d/64 scope link
valid_lft forever preferred_lft forever
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:42:0f:b8 brd ff:ff:ff:ff:ff:ff
inet 192.168.60.11/24 brd 192.168.60.255 scope global enp0s8
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:fe42:fb8/64 scope link
valid_lft forever preferred_lft forever
4: enp0s9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:a8:83:cf brd ff:ff:ff:ff:ff:ff
inet 192.168.209.15/24 brd 192.168.209.255 scope global enp0s9
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:fea8:83cf/64 scope link
valid_lft forever preferred_lft forever
[root@lunar1 ~]#
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列–1-简介
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列-2-修改主机名和hostnamectl工具的使用
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列–3-systemd（d.bin和ohasd守护进程）
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列–4-target（图形界面和字符界面）
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列–5-防火墙
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列–6-开机自动启动或者禁用服务
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列-7-网络管理之添加网
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列-7-网络管理之修改IP地址
Linux7（CentOS,RHEL,OEL）和Oracle RAC环境系列-7-网络管理之修改网络接口名
