Is it necessary to restart to configure hosts under Linux?

Configuring hosts under Linux does not require a restart, because the "/etc/hosts" file is a local static mapping table that will be read every time a network request occurs, so as long as the /etc/ When the hosts file is modified, the new mapping relationship will take effect immediately without restarting the system.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

Under Linux, when you modify the /etc/hosts file (used to configure the mapping relationship between host names and IP addresses), you usually do not need to restart the system for the changes to take effect.

/etc/hosts file is a local static mapping table, which is read every time a network request occurs. Therefore, as long as you save the modification to the /etc/hosts file, the new mapping relationship will take effect immediately without restarting the system.

When you modify the /etc/hosts file, the operating system will use the new mapping relationship to resolve domain names. This means that when you use the ping command in the terminal or visit the website in the browser, they will immediately use the new mapping.

It should be noted that some applications may cache DNS lookup results upon startup. In this case, after changing the /etc/hosts file, you may need to restart these applications for the new mapping to take effect.

In short, when you modify the /etc/hosts file, in most cases you do not need to restart the system. The new mapping takes effect immediately and will be read on every network request.

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