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linux 基础操作（十）设置 ip

centos7

静态 ip

设置 ip
[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# ls
ifcfg-enp0s3  ifdown-eth  
[root@localhost network-scripts]# vi ifcfg-enp0s3 

TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
# 静态ip
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="enp0s3"
UUID="9dbd4c1e-86e9-4ff6-81f0-47951adcfffa"
DEVICE="enp0s3"
ONBOOT="yes"
# ip地址
IPADDR="192.168.211.243"
# 子网掩码
NETMASK="255.255.255.0"
# 网关
GATEWAY="192.168.211.254"
设置 DNS
[root@localhost network-scripts]# vi /etc/resolv.conf

# Generated by NetworkManager
nameserver 201.210.33.52
nameserver 201.130.33.60
# 国内
nameserver 114.114.114.114
# 阿里
nameserver 223.5.5.5
# 百度
nameserver 180.76.76.76
重启网卡
[root@localhost network-scripts]# service network restart
Restarting network (via systemctl):                        [  OK  ]

设置动态 ip

设置动态获取 ip
[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# ls
ifcfg-enp0s3  ifdown-eth  
[root@localhost network-scripts]# vi ifcfg-enp0s3 

TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
# 动态ip
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="enp0s3"
UUID="9dbd4c1e-86e9-4ff6-81f0-47951adcfffa"
DEVICE="enp0s3"
ONBOOT="yes"
重启网卡
[root@localhost network-scripts]# service network restart
Restarting network (via systemctl):                        [  OK  ]

域名指向同一内网下服务器访问不到

配置域名对应的内网地址

[root@localhost app]# vim /etc/hosts
# 文件服务器
192.168.218.20 fastdfs.test.com

ubuntu18

查看操作系统版本

ubuntu 每个大版本的设置方式都不一样，一定要先确认服务器的系统版本。

cat /etc/issue
uname -a

修改 /etc/netplan/*.yaml 文件

[root@localhost ~]# sudo cd /etc/netplan
[root@localhost ~]# sudo vim 01-network-manager-all.yaml

network:
           version: 2
          ethernets:
          ens3:
                       dhcp4: no
                       addresses:[192.168.2.210/24,]
                       gateway4: 192.168.2.1

[root@localhost ~]# sudo netplan apply

修改 DNS 临时生效

开机重启后该配置会被覆盖掉

[root@localhost ~]# sudo  vim /etc/resolv.conf

nameserver 202.102.154.3
nameserver 114.114.114.114
nameserver 8.8.8.8

修改 DNS 永久生效

[root@localhost ~]# sudo vim /etc/systemd/resolved.conf
[Resolve]
DNS=202.102.154.3 114.114.114.114 8.8.8.8
#FallbackDNS=
#Domains=
#LLMNR=no
#MulticastDNS=no
#DNSSEC=no
#DNSOverTLS=no
#Cache=yes
#DNSStubListener=yes

配置生效

[root@localhost ~]# systemctl restart systemd-resolved.service

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