linux系统下怎么连接网络

linux系统下连网络， *** 作步骤如下：

1、首先用root用户登录linux桌面系统。

2、然后点击上方的【系统】， 在下拉菜单中点击【首选项】。

3、然后点击列表里的【网络连接】。

4、然后点击“编辑”。打开“IPV4 设置”页面，选择“方法”为“手动”。

5、选择“添加”。填写自己分配的ip地址，子网掩码，网关，DNS服务器等信息，参照windows 系统填写。填写完成后，点击“应用”即可。

Linux配置ip地址的两种方法，实验环境为centos7.6方法1：nmcli工具配置 （centos7以下版本不支持该方法）第一步，通过nmcli connection查看网卡名称[root@localhost ~]# nmcli connection NAME UUID TYPE DEVICEeth0  09be0948-faf1-43b6-a5a4-c19efab0bb48 ethernet eth0第二步，配置ip，网关，dns，并设置网卡开机自动启动，最后开启网卡[root@localhost ~]# nmcli connection modify eth0 ipv4.addresses "192.168.1.201/24" 说明：配置地址和掩码 [root@localhost ~]# nmcli connection modify eth0 ipv4.gateway "192.168.1.1" 说明：配置网关 [root@localhost ~]# nmcli connection modify eth0 ipv4.dns "180.76.76.76" 说明：配置dns [root@localhost ~]# nmcli connection modify eth0 ipv4.method manual 说明：地址获取的方法为手动配置而不是dhcp [root@localhost ~]# nmcli connection modify eth0 autoconnect yes 说明：开机自动打开网卡 [root@localhost ~]# nmcli connection up eth0 说明：立即打开网卡 Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/4)第三步，查看结果（这里使用ip addr命令查看，较新版本Linux系统支持该命令）[root@localhost ~]# ip addr1: lo:  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 forever2: eth0:  mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:84:23:62 brd ff:ff:ff:ff:ff:ffinet 192.168.1.201/24  brd 192.168.1.255 scope global noprefixroute eth0 valid_lft forever preferred_lft forever inet6 fe80::b7ad:e2ed:832e:99a9/64 scope link noprefixroute valid_lft forever preferred_lft forever测试通信[root@localhost ~]# ping www.baidu.com PING www.a.shifen.com (61.135.169.121) 56(84) bytes of data. 64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=1 ttl=53 time=34.7 ms 64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=2 ttl=53 time=27.9 ms 64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=3 ttl=53 time=24.1 ms 64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=4 ttl=53 time=25.2 ms 64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=5 ttl=53 time=24.2 ms ^C --- www.a.shifen.com ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4005ms rtt min/avg/max/mdev = 24.177/27.277/34.718/3.970 ms 方法2：通过vi编辑网卡配置文件（最新版rhel8或centos8不推荐该方法，老版本rhel6及以下推荐该方法）第一步，通过vi或vim打开配置文件[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0第二步，编辑相关的参数TYPE=Ethernet PROXY_METHOD=none BROWSER_ONLY=no BOOTPROTO=none 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=eth0 UUID=09be0948-faf1-43b6-a5a4-c19efab0bb48 DEVICE=eth0 ONBOOT=yes IPADDR=192.168.1.202 PREFIX=24 GATEWAY=192.168.1.1 DNS1=180.76.76.76 PEERDNS=no vi的编辑方法是，输入字母i，进行编辑，编辑完成后，按esc，再按:wq 保存退出。如果不保存，则是:q!退出第三步，重启网络服务[root@localhost ~]# service network restart Restarting network (via systemctl): [ OK ]第四步，查看结果并测试通信（这里用ifconfig命令来查看，各种版本Linux均支持该命令）[root@localhost ~]# ifconfig eth0 eth0: flags=4163 mtu 1500 inet 192.168.1.202 netmask 255.255.255.0 broadcast 192.168.1.255 inet6 fe80::b7ad:e2ed:832e:99a9 prefixlen 64 scopeid 0x20 ether 00:0c:29:84:23:62 txqueuelen 1000 (Ethernet) RX packets 1117 bytes 127303 (124.3 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 564 bytes 69559 (67.9 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [root@localhost ~]# ping www.baidu.com PING www.a.shifen.com (61.135.169.125) 56(84) bytes of data. 64 bytes from 61.135.169.125 (61.135.169.125): icmp_seq=1 ttl=53 time=28.2 ms 64 bytes from 61.135.169.125 (61.135.169.125): icmp_seq=2 ttl=53 time=30.9 ms ^C --- www.a.shifen.com ping statistics --- 3 packets transmitted, 2 received, 33% packet loss, time 2003ms rtt min/avg/max/mdev = 28.228/29.590/30.953/1.373 ms [root@localhost ~]# 配置地址的两种方法就介绍到这里。 但是查看地址时，我们并没有看到网关和dns，那么网关和dns怎么看呢，用以下两条命令即可 [root@localhost ~]# route -n 通过查看路由表来知道网关 Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 eth0 [root@localhost ~]# cat /etc/resolv.conf 通过查看rsolv.conf文件来查看dns # Generated by NetworkManager nameserver 180.76.76.76 更多网络技术公开课，腾讯课堂搜“ 众元教育 ”，戳 免费公开课 ，可直接听课哦！

---