linux网络相关的命令,linux网络相关命令
linux网络相关的命令,linux网络相关命令
ifconfig查看网卡
ifconfig是在centos6中查看网卡的命令,在centos7中要安装net-tools包后才能使用?
网卡配置文件:/etc/sysconfig/network-scripts/ifcfg-ens33?
命令:ifconfig
[root@shuai-01 ~]# ifconfig ens33: flags=4163mtu 1500 inet 192.168.176.135 netmask 255.255.255.0 broadcast 192.168.176.255 inet6 fe80::16f5:8ee4:b971:e6fb prefixlen 64 scopeid 0x20 ether 00:0c:29:a1:0e:2c txqueuelen 1000 (Ethernet) RX packets 236 bytes 23351 (22.8 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 216 bytes 25791 (25.1 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10 loop txqueuelen 1 (Local Loopback) RX packets 68 bytes 5524 (5.3 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 68 bytes 5524 (5.3 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
关闭网卡:
ifdown ens33
启动网卡:
ifup ens33
关闭网卡时,是无法远程连接的。特别是正在使用该网卡时。
想重启某个网卡:
[root@shuai-01 ~]# ifdown ens33 && ifup ens33 成功断开设备 'ens33'。 成功激活的连接(D-Bus 激活路径:/org/freedesktop/NetworkManager/ActiveConnection/1)
想重启网络服务:
service restrat network
给一个网卡设置多个ip
一个网卡是可以设置多个IP的,给一块网卡设置一个虚拟IP?
进入网卡配置文件并拷贝一份配置文件
[root@shuai-01 ~]# cd /etc/sysconfig/network-scripts/ [root@shuai-01 network-scripts]# ls ifcfg-ens33 ifdown-ppp ifup-ib ifup-Team ifcfg-lo ifdown-routes ifup-ippp ifup-TeamPort ifdown ifdown-sit ifup-ipv6 ifup-tunnel ifdown-bnep ifdown-Team ifup-isdn ifup-wireless ifdown-eth ifdown-TeamPort ifup-plip init.ipv6-global ifdown-ib ifdown-tunnel ifup-plusb network-functions ifdown-ippp ifup ifup-post network-functions-ipv6 ifdown-ipv6 ifup-aliases ifup-ppp ifdown-isdn ifup-bnep ifup-routes ifdown-post ifup-eth ifup-sit [root@shuai-01 network-scripts]# cp ifcfg-ens33 ifcfg-ens33:0
vi新的配置文件更改信息:NAME,DEVICE,IPADDR,GATEWAY,DNS
NAME=ens33:0 DEVICE=ens33:0 IPADDR=192.168.176.150
GATEWAY ,DNS不要
保存退出后重启网卡:
[root@shuai-01 network-scripts]# ifdown ens33 && ifup ens33
查看网卡的连接状态
命令:mii-tool
[root@shuai-01 network-scripts]# mii-tool ens33 ens33: negotiated 1000baseT-FD flow-control, link ok
link ok 表示连接网线?
命令:ethtool
[root@shuai-01 network-scripts]# ethtool ens33 Settings for ens33: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: internal Auto-negotiation: on MDI-X: off (auto) Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes
link detected : yes 表示连接网线
更改主机名
命令:hostnamectl?
命令格式:hostnamectl set-hostname 主机名
主机名的配置文件:/etc/hostname
设置dns
dns配置文件:/etc/resolv.conf
查看dns配置文件:
[root@shuai-01 network-scripts]# cat /etc/resolv.conf # Generated by NetworkManager nameserver 119.29.29.29
更改dns及可以在网卡配置文件中更改,又可以在dns配置文件中更改?
在网卡配置文件中加:
DNS2=8.8.8.8
在dns配置文件中(临时):
nameserver 8.8.8.8
自定义解析域名,在本机生效,定义完后,不用进过dns解析域名。?
配置文件:/etc/hosts
添加一个解析域名:
[root@shuai-01 network-scripts]# vim /etc/hosts
添加解析域名:
192.168.172.3 www.baidu.com 193.168.176.56 www.qq.com www.hao123.com
ping:
[root@shuai-01 network-scripts]# ping www.baidu.com PING www.baidu.com (192.168.172.3) 56(84) bytes of data. [root@shuai-01 network-scripts]# ping www.qq.com PING www.qq.com (193.168.176.56) 56(84) bytes of data.
- 一个IP后可跟多个域名
- 一行只能有一个IP
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