下载CentOS~7.9镜像

下载地址：https://llwp.linlink.xyz/%E8%BD%AF%E4%BB%B6%E7%B3%BB%E5%88%97/%E8%99%9A%E6%8B%9F%E6%9C%BA%E7%B3%BB%E5%88%97/%E7%B3%BB%E7%BB%9F%E9%95%9C%E5%83%8F/CentOS-7-x86_64-DVD-2009.iso

配置VMware网络

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开始安装CentOS

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选择Install CentOS 7

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选择语言

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分区(怎么都行)

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直接安装

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设置root密码

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弱密码点两次

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重启

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配置NAT静态ip

查看网卡得知NAT的配置文件为ens33

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[root@localhost ~]# 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 pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:d5:f7:1b brd ff:ff:ff:ff:ff:ff
    inet 192.168.20.200/24 brd 192.168.20.255 scope global noprefixroute dynamic ens33
       valid_lft 1489sec preferred_lft 1489sec
    inet6 fe80::f230:6540:5c24:735/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

编辑ens33

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vi /etc/sysconfig/network-scripts/ifcfg-ens33

有的有双引号，有的没有，自己注意

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TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="static"
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="ens33"
UUID="d6084321-b13a-43b9-a474-26cb3ca78413"
DEVICE="ens33"
ONBOOT="yes"
IPV6_PRIVACY="no"
IPADDR="192.168.20.10"
NETMASK="255.255.255.0"
GATEWAY="192.168.20.2"
DNS1="192.168.20.2"

关机

添加第二个网卡,放后面不容易出错(需要就操作不需要就跳过)

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必须确定第一张网卡是NAT,第二张网卡是仅主机

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配置仅主机模式静态ip

查看网卡得知仅主机模式的配置文件为ens36，有的是ens34或者其它

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[root@localhost ~]# 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 pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:d5:f7:1b brd ff:ff:ff:ff:ff:ff
    inet 192.168.20.200/24 brd 192.168.20.255 scope global noprefixroute dynamic ens33
       valid_lft 1730sec preferred_lft 1730sec
    inet6 fe80::f230:6540:5c24:735/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: ens36: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:d5:f7:25 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.200/24 brd 192.168.10.255 scope global noprefixroute dynamic ens36
       valid_lft 1729sec preferred_lft 1729sec
    inet6 fe80::1da4:c7ed:f085:ce2d/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

查看是否有ens36文件,好像是没有,有就直接编辑它

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[root@localhost ~]# ll /etc/sysconfig/network-scripts/
total 232
-rw-r--r--. 1 root root   328 Sep 23 11:39 ifcfg-ens33
-rw-r--r--. 1 root root   254 May 22  2020 ifcfg-lo
lrwxrwxrwx. 1 root root    24 Sep 23 11:38 ifdown -> ../../../usr/sbin/ifdown
-rwxr-xr-x. 1 root root   654 May 22  2020 ifdown-bnep
-rwxr-xr-x. 1 root root  6532 May 22  2020 ifdown-eth

如果没有ens36，如果是ens34,把下面ens36修改为ens34

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nmcli con add con-name ens36 type ethernet ifname ens36

继续查看有没有ens36文件,这下有了

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[root@localhost ~]# ll /etc/sysconfig/network-scripts/
total 236
-rw-r--r--. 1 root root   328 Sep 23 11:39 ifcfg-ens33
-rw-r--r--. 1 root root   280 Sep 23 12:03 ifcfg-ens36
-rw-r--r--. 1 root root   254 May 22  2020 ifcfg-lo
lrwxrwxrwx. 1 root root    24 Sep 23 11:38 ifdown -> ../../../usr/sbin/ifdown
-rwxr-xr-x. 1 root root   654 May 22  2020 ifdown-bnep
-rwxr-xr-x. 1 root root  6532 May 22  2020 ifdown-eth
-rwxr-xr-x. 1 root root   781 May 22  2020 ifdown-ippp
-rwxr-xr-x. 1 root root  4540 May 22  2020 ifdown-ipv6

编辑ens36

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vi /etc/sysconfig/network-scripts/ifcfg-ens36

有的有双引号，有的没有，自己注意

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TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
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=ens36
UUID=e58dad0e-108b-4039-9ad3-2bec0f5799c0
DEVICE=ens36
ONBOOT=yes
IPADDR=192.168.10.10
NETMASK=255.255.255.0
GATEWAY=192.168.10.2
DNS1=192.168.10.2

重启网卡

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systemctl restart network

查看ip

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[root@localhost ~]# 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 pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:d5:f7:1b brd ff:ff:ff:ff:ff:ff
    inet 192.168.20.10/24 brd 192.168.20.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::f230:6540:5c24:735/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: ens36: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:d5:f7:25 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.10/24 brd 192.168.10.255 scope global noprefixroute ens36
       valid_lft forever preferred_lft forever
    inet6 fe80::5cdf:75f:54b:12dd/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

测试网络连通性

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[root@localhost ~]# ping baidu.com
PING baidu.com (110.242.68.66) 56(84) bytes of data.
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=1 ttl=128 time=45.5 ms
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=2 ttl=128 time=45.6 ms
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=3 ttl=128 time=45.5 ms
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=4 ttl=128 time=45.7 ms
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=5 ttl=128 time=45.4 ms
^C
--- baidu.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4010ms
rtt min/avg/max/mdev = 45.468/45.613/45.793/0.291 ms