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Перезапуск сети в Ubuntu
В Ubuntu и Debian инициализацией сетевых интерфейсов и настройкой сети занимается специальная сетевая служба — networking. Информация о конфигурации сетевых интерфейсов хранится в файле /etc/network/interfaces.
Если вы что-либо измените в этом файле, нужно будет перезапустить сеть, чтобы применить изменения. В этой статье мы рассмотрим как выполнить перезапуск сети Ubuntu 16.04.
Перезагрузка сети в Ubuntu
Можно, конечно, выполнить полную перезагрузку компьютера, но это не совсем удобно если можно просто перезапустить сеть Ubuntu. Для перезапуска сети используйте следующую команду:
sudo service networking restart
В современных дистрибутивах уже давным давно используется система инициализации Systemd, поэтому можно использовать команду systemctl вместо команды service:
sudo systemctl restart networking.service
Кроме того, можно перезапустить NetworkManager, это тоже помогает, если сеть настроена через него:
sudo systemctl restart NetworkManager
Перезапуск сети в NetworkManager
Чаще всего, для управления сетью в современных дистрибутивах используется программа Network Manager. Можно сразу же использовать ещё для наших целей. Просто отключите, а затем включите сеть обратно следующими командами:
sudo nmcli networking off
sudo nmcli networking on
После отключения сети значок NetworkManager пропадёт с панели, а потом снова появится после включения. Аналогично, вы можете использовать NetworkManager в графическом интерфейсе. Кликните по его иконке, выберите нужное сетевое подключение и нажмите Выключить:
Затем включите его обратно.
Команды ifup и ifdown
Эти команды работают на более низком уровне, они управляют непосредственно самими сетевым интерфейсами. Для перезапуска сети мы можем отключить все интерфейсы, а затем включить обратно:
Вы не увидите никаких изменений в графическом интерфейсе, но когда сетевой интерфейс будет отключён, вы не будете иметь доступа к интернету.
Выводы
Как видите, не всегда обязательно перезагружать компьютер после изменений настроек, в большинстве случаев достаточно перезапустить только нужный сервис. Надеюсь, эта информация была вам полезной.
Обнаружили ошибку в тексте? Сообщите мне об этом. Выделите текст с ошибкой и нажмите Ctrl+Enter.
How to restart network services in Linux
Sometimes, when you changed the network configuration or due to some network problems, you may need to restart the network services again on your Linux system to solve your problem. In this article, we will talk about how to restart the networking services on in different Linux distributions (Ubuntu, Debian, LinuxMint and CentOS) by using the command line. We have implemented different commands on Ubuntu 20.04 and CentOS 8 system. All commands which we have executed on Ubuntu 20.04 can be also used for Debian and LinuxMint distributions.
Get network Service Status
You can get the network services running status by using the following command:
For latest (Ubuntu/Debian/Mint)
To check the networking services are running on your system or not, by using the following ‘systemctl’ command you can view the networking service status on your Ubuntu/Debian/Mint system:
You can also display the networking service status by using the service command which is given as follows:
For CentOS 8 / Fedora
If you are using CentOS 8 then you can check the network service status by using the following command:
If you received an error like ‘network.service unit not found’ then, you will run the following command to start the network manager:
Now, start the network services and you can get network status by using the above-mentioned command.
Stop Network Services
You can stop your network services through the method which is mentioned below. But, if you have a remote connection with SSH, we are not recommended you to stop the service because it may create problems.
For Ubuntu/Debian/Mint
You can use the ‘stop’ option with the above ‘networking’ command on Ubuntu, Debian, Kali, Mint distributions in order to stop network services.
For CentOS 8/Fedora
In CentOS 8, using the following command you can stop network services:
Now, if you will check the network status you will see that network services are stopped on your system.
Start Network Service
If networking services are stopped on your system then, you start these services on the Linux system.
For Ubuntu/Debian/Mint
You can also start the network services by using the service command. Use ‘start’ option to start the network service on your Ubuntu. Debian and LinuxMint distributions.
For CentOS 8/Fedora
In CentOS 8, by using the following command you can start the network service on your system:
Restart Network Service
You can also restart the network service by using the following command on Linux distributions:
For Ubuntu/Debian/Mint
Type the following command to restart the network service on Ubuntu, Debian, and Linux Mint:
For CentOS 8/Fedora
Use the following command to restart the network service on CentOS 8:
If you get the following error on the terminal then, you need to start the NetworkManager services on your system by using the following command:
Now, again restart the network service. You will see the following output on the CentOS system:
Conclusion
From the above information, we have explored how to start, stop, and restart the network service on different Linux distribution like Ubuntu, Debian, Linux Mint, and CentOS 8. Moreover, you can troubleshoot the network error through the NetworkManager tool on CentOS 8. If you need more details then, you can implement all command on your system and then let us know about your problems. Please don’t stop services if you have a remote ssh connection that may create a problem.
Samreena Aslam holds a master’s degree in Software Engineering. She’s a technical writer and has written various articles on different Linux flavours including Ubuntu, Debian, CentOS and Mint as well as programming guides in various programming languages
How to restart network interfaces on Linux
O nce you make changes in the network interface, they affect the network services manager of your system. To enable the system or machine to connect to the network, one needs to restart the network interface to apply the changes without rebooting your server.
This article will guide you on restarting the network interface in various Linux distributions.
Note: When running SSH/ VNC or other remote-based sessions, you should take precautions since restarting the network interface or service can result in network disconnectivity, resulting in connection loss.
We will handle the following topics.
What is a network interface?
A network interface refers to the point of connection between a computer and the network. It can be either software (especially with Virtual machines) or a hardware component. When dealing with network interfaces, there is one term that you will likely come across – NIC (Network Interface Card).
A Network Interface Card is a circuit board chip inserted/ soldered on the motherboard allowing your computer to connect to the internet. If you have worked with many earlier Desktop computers (even some today), you know that most cannot connect to a WiFi network, and that’s because they don’t have a wireless NIC. You are advised to purchase a USB Network Adapter that will act as your wireless interface connection in such a situation.
How to list network interfaces on Linux
You can use different ways to see all the available network interfaces on your system. You can use the GUI or the Command-line (CLI). In this post, we highly recommend using the Terminal (CLI) since the GUI settings app might not list specific interfaces.
- ifconfig
- ip
- netstat
- nmcli
1. The ifconfig command
This command has long been used to list and configure network interfaces on Linux. Unfortunately, this command is marked as ‘deprecated’ and does not come pre-installed in certain distributions like recent Debian and Kali Linux releases.