Linux网络管理之网络管理工具

1 网络管理工具

1.1 CentOS 6

net-tool：

• ifconfig

  • 查看网卡信息
  • 临时修改网卡

 [root@localhost ~]# ifconfig eth0 192.168.1.1 netmask 255.255.255.0

• netstat

  • 查看当前系统运行哪些网络服务,网络连接状态，常用于查询服务是否开启或进程的进程号然后杀了它。。。
  • 常用命令

 [root@localhost ~]# netstat -tulnp	#tcp、udp、监听状态、不做域名解析、显示进程名

 [root@localhost ~]# netstat -ant	#查看所有、不做域名解析、tcp

• route

  • 查看路由信息
  • 不做域名解析

 [root@localhost ~]# route -n
 Kernel IP routing table
 Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
 0.0.0.0         192.168.159.2   0.0.0.0         UG    100    0        0 ens33
 192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
 192.168.159.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33

1. 2 CentOS 7

iproute2

• ip

  • 查看网卡信息

 [root@localhost ~]# ip addr show
 1: lo:  mtu 65536 qdisc noqueue state UNKNOWN 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:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
     link/ether 00:0c:29:59:90:81 brd ff:ff:ff:ff:ff:ff
     inet 192.168.159.129/24 brd 192.168.159.255 scope global noprefixroute ens33
        valid_lft forever preferred_lft forever
     inet6 fe80::f74f:5221:c828:ed5c/64 scope link noprefixroute 
        valid_lft forever preferred_lft forever
 3: virbr0:  mtu 1500 qdisc noqueue state DOWN qlen 1000
     link/ether 52:54:00:1c:8f:cf brd ff:ff:ff:ff:ff:ff
     inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
        valid_lft forever preferred_lft forever
 4: virbr0-nic:  mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
     link/ether 52:54:00:1c:8f:cf brd ff:ff:ff:ff:ff:ff

• 查看路由信息

 [root@localhost ~]# ip route show
 default via 192.168.159.2 dev ens33 proto static metric 100 
 192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 
 192.168.159.0/24 dev ens33 proto kernel scope link src 192.168.159.129 metric 100 

• ss（相当于netstat）

 [root@localhost ~]# ss -tulnp
 [root@localhost ~]# ss -ant

1. 3 网络服务管理命令

[root@localhost ~]# systemctl start|stop|restart|status network

2 网卡配置

网卡配置

3 系统实操

系统实操