Linux service configuration-linux system route configuration

I. network-related commands in linux: the network configuration file is in etcsysconfignetwork-scr

1. network-related commands in linux: the network configuration file is in/etc/sysconfig/network-scripts.

Mii-tool-v.

Ethtool

Lscpu, lsusb, lsblk, and lspci-v to view information about each hardware.

1. ifconfig eth0 ip_address netmask net_mask modify the IP address and subnet mask of the NIC

2. ifconfig eth0 ip_address/24 configure the IP address and subnet mask

3. ifconfig eth0 down/up disable Nic, do not reload Nic configuration file/etc/sysconfig/network-scripts/ifcfg-eth0

4. ifconfig eth0 hw ether MAC_Address configure MAC address

5. ifconfig eth0: 1 IP_Address: configure the virtual network interface

6. configure the wireless network card in iwconfig.

7. View arp tables through arp-n

8. arp-s Ip_address Mac_address static binding MAC address

9. view the route table in route-n

10. traceroute

2. configure the linux system as a router:

1. enable route forwarding:

A. The routing and forwarding function of sysctl-w net. ipv4.ip _ forward = 1 is temporarily valid and cannot be restarted.

B. echo 1>/proc/sys/net/ipv4/ip_forward is temporarily valid and suitable for scripts.

C. modify the/etc/sysctl. conf file and change the variable value of net. ipv4.ip _ forward to 1. then enter sysctl-p to restart the configuration file.

2. add default routes and static routes

A. route add default gw IP_address add a default route.

B. delete the default route using route del default

C. route add-net network address gw IP_address add a static route.

D. route del-net network address gw Ip_address delete static route

E. vi/etc/sysconfig/network-scipts/route-eth0 and then add the static routing format in the file as follows:

Network/24 via IP_address is a permanent static route.

III. Solution to failure of Nic cloning for virtual machines.

1. clear the/etc/udev/rules. d/70-persistent-net.rules file.

2. delete the/etc/sysconfig/network-scipts/ifcfg-ethX file.

3. add a new NIC