自動獲取IP命令: dhclient [root@localhost ~]# dhclient 查看ip地址信息: ip add/address [root@localhost ~]# ip address 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: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:7c:ee:a3 brd ff:ff:ff:ff:ff:ff # 網卡信息 inet 192.168.77.129/24 brd 192.168.77.255 scope global eno16777736 # IP地址信息 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe7c:eea3/64 scope link valid_lft forever preferred_lft forever 網絡配置文件路徑: /etc/sysconfig/network-scripts/ifcfg-(網卡名),能夠經過vi命令對其進行編輯 vi /etc/sysconfig/network-scripts/ifcfg-eno16777736 修改內容以下:
設置完成後,按esc鍵在輸入:wq進行保存退出。 執行命令: systemctl restart network.service 重啓網絡服務 重啓後測試一下網絡 ping www.baidu.com [root@localhost ~]# ping www.baidu.com PING www.a.shifen.com (119.75.213.61) 56(84) bytes of data. 64 bytes from 127.0.0.1 (119.75.213.61): icmp_seq=1 ttl=128 time=9.74 ms 64 bytes from 127.0.0.1 (119.75.213.61): icmp_seq=2 ttl=128 time=9.53 ms 64 bytes from 127.0.0.1 (119.75.213.61): icmp_seq=3 ttl=128 time=10.4 ms 64 bytes from 127.0.0.1 (119.75.213.61): icmp_seq=4 ttl=128 time=10.2 ms 網絡正常。 若是DNS填寫錯誤致使網卡不正確,能夠經過命令route -n 來查看網關信息 [root@localhost ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.77.2 0.0.0.0 UG 1024 0 0 eno16777736 192.168.77.0 0.0.0.0 255.255.255.0 U 0 0 0 eno16777736 這是正確狀態。
查詢網絡情況時,除了使用ip add以外,還能夠使用ifconfig,但若是提示找不到該命令時,能夠經過yum進行安裝對應的工具庫。git
[root@localhost ~]# yum install -y net-tools 已加載插件:fastestmirror http://mirrors.shu.edu.cn/centos/7.5.1804/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect 正在嘗試其它鏡像。 http://mirrors.nwsuaf.edu.cn/centos/7.5.1804/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed conne 正在嘗試其它鏡像。 base extras updates (1/4): base/7/x86_64/group_gz (2/4): extras/7/x86_64/primary_db (3/4): updates/7/x86_64/primary_db (4/4): base/7/x86_64/primary_db Determining fastest mirrors * base: mirror.bit.edu.cn * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com 正在解決依賴關係 --> 正在檢查事務 ---> 軟件包 net-tools.x86_64.0.2.0-0.22.20131004git.el7 將被 安裝 --> 解決依賴關係完成 依賴關係解決 ============================================================================================================= Package 架構 版本 ============================================================================================================= 正在安裝: net-tools x86_64 2.0-0.22.20131004git.el 事務概要 ============================================================================================================= 安裝 1 軟件包 總下載量:305 k 安裝大小:917 k Downloading packages: 警告:/var/cache/yum/x86_64/7/base/packages/net-tools-2.0-0.22.20131004git.el7.x86_64.rpm: 頭V3 RSA/SHA256 Si net-tools-2.0-0.22.20131004git.el7.x86_64.rpm 的公鑰還沒有安裝 net-tools-2.0-0.22.20131004git.el7.x86_64.rpm 從 file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 檢索密鑰 導入 GPG key 0xF4A80EB5: 用戶ID : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>" 指紋 : 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5 軟件包 : centos-release-7-0.1406.el7.centos.2.3.x86_64 (@anaconda) 來自 : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 Running transaction check Running transaction test Transaction test succeeded Running transaction 正在安裝 : net-tools-2.0-0.22.20131004git.el7.x86_64 驗證中 : net-tools-2.0-0.22.20131004git.el7.x86_64 已安裝: net-tools.x86_64 0:2.0-0.22.20131004git.el7 完畢! 安裝完畢後,就能夠使用ifconfig命令了