The path of Linux network configuration files and the introduction of common configuration files

Linux network configuration files are usually stored in the /etc directory. Here are some common network configuration files and what they do:

1. /etc/hosts: Used to map host names and IP addresses, you can manually add static host name resolution information.

2. /etc/hostname: used to set the host name of the machine.

3. /etc/resolv.conf: Used to configure the DNS resolution server, including the IP address of the domain name server, search domain, etc.

4. /etc/network/interfaces: Used to configure network interfaces, such as IP address, subnet mask, gateway, DNS server, etc.

5. /etc/sysconfig/network-scripts/ifcfg-ethX: Used to configure network interfaces on Red Hat series systems, where X indicates the serial number of the network interface, such as eth0, eth1, etc.

6. /etc/sysconfig/network: Used to set the network host name and default gateway on systems such as CentOS and Red Hat.

7. /etc/nsswitch.conf: Used to configure the naming service switcher of the system. You can set whether the system uses the local host name mapping or the DNS server first when resolving domain names.

8. /etc/hosts.allow and /etc/hosts.deny: Used to set the access control policy of TCP Wrappers, which can restrict the access of certain IP addresses or host names.

The above are some common Linux network configuration files, and different Linux distributions may be different. For novices, you can first learn and be familiar with the usage of the above configuration files, so that you can perform corresponding network configurations when needed.

When it comes to network configuration, here are a few common configuration files in Linux and what they do:

1. /etc/hostname: This file contains the hostname of the system. Commands can be used hostnameto view or change the hostname.

2. /etc/hosts: This file specifies the mapping relationship between the IP address of the machine and the domain name. When a user wants to access a specific domain name, the system will first look for the corresponding IP address in this file.

3. /etc/resolv.conf: This file contains the IP address of the DNS server. When a user wants to visit a certain website, the system will query the DNS server in this file to obtain the corresponding IP address.

4. /etc/network/interfaces: This file contains configuration information for network interfaces. Users can specify the IP address, subnet mask, gateway and other information of the network interface in this file.

5. /etc/sysctl.conf: This file contains the configuration information of kernel parameters, such as IP forwarding, network buffer, etc. Users can modify these parameters in this file to achieve the purpose of network optimization.

6. /etc/nsswitch.conf: This file contains the configuration of how the system resolves host names and user information. In this file, the user can specify the priority of resolving the host name and user information, such as first querying the local file or first querying the DNS server.

The above are several common network configuration files and their functions in Linux. When configuring the network, these files can be modified as needed to meet specific network configuration requirements.