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228 lines
7.3 KiB
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[#]: collector: (lujun9972)
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[#]: translator: ( )
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (4 Methods To Change The HostName In Linux)
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[#]: via: (https://www.2daygeek.com/four-methods-to-change-the-hostname-in-linux/)
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[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
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4 Methods To Change The HostName In Linux
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======
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We had written an article yesterday in our website about **[changing hostname in Linux][1]**.
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Today we are going to show you that how to change the hostname using different methods. You can choose the best one for you.
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systemd systems comes with a handy tool called `hostnamectl` that allow us to manage the system hostname easily.
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It’s changing the hostname instantly and doesn’t required reboot when you use the native commands.
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But if you modify the hostname manually in any of the configuration file that requires reboot.
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In this article we will show you the four methods to change the hostname in systemd system.
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hostnamectl command allows to set three kind of hostname in Linux and the details are below.
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* **`Static:`** It’s static hostname which is added by the system admin.
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* **`Transient/Dynamic:`** It’s assigned by DHCP or DNS server at run time.
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* **`Pretty:`** It can be assigned by the system admin. It is a free-form of the hostname that represent the server in the pretty way like, “JBOSS UAT Server”.
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It can be done in the following four methods.
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* **`hostnamectl Command:`** hostnamectl command is controling the system hostname.
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* **`nmcli Command:`** nmcli is a command-line tool for controlling NetworkManager.
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* **`nmtui Command:`** nmtui is a text User Interface for controlling NetworkManager.
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* **`/etc/hostname file:`** This file is containing the static system hostname.
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### Method-1: Change The HostName Using hostnamectl Command in Linux
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hostnamectl may be used to query and change the system hostname and related settings.
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Simple run the `hostnamectl` command to view the system hostname.
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```
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$ hostnamectl
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or
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$ hostnamectl status
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Static hostname: daygeek-Y700
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Icon name: computer-laptop
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Chassis: laptop
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Machine ID: 31bdeb7b83230a2025d43547368d75bc
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Boot ID: 267f264c448f000ea5aed47263c6de7f
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Operating System: Manjaro Linux
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Kernel: Linux 4.19.20-1-MANJARO
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Architecture: x86-64
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```
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If you would like to change the hostname, use the following command format.
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**The general syntax:**
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```
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$ hostnamectl set-hostname [YOUR NEW HOSTNAME]
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```
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Use the following command to change the hostname using hostnamectl command. In this example, i’m going to change the hostname from `daygeek-Y700` to `magi-laptop`.
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```
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$ hostnamectl set-hostname magi-laptop
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```
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You can view the updated hostname by running the following command.
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```
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$ hostnamectl
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Static hostname: magi-laptop
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Icon name: computer-laptop
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Chassis: laptop
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Machine ID: 31bdeb7b83230a2025d43547368d75bc
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Boot ID: 267f264c448f000ea5aed47263c6de7f
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Operating System: Manjaro Linux
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Kernel: Linux 4.19.20-1-MANJARO
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Architecture: x86-64
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```
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### Method-2: Change The HostName Using nmcli Command in Linux
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nmcli is a command-line tool for controlling NetworkManager and reporting network status.
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nmcli is used to create, display, edit, delete, activate, and deactivate network connections, as well as control and display network device status. Also, it allow us to change the hostname.
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Use the following format to view the current hostname using nmcli.
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```
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$ nmcli general hostname
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daygeek-Y700
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```
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**The general syntax:**
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```
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$ nmcli general hostname [YOUR NEW HOSTNAME]
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```
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Use the following command to change the hostname using nmcli command. In this example, i’m going to change the hostname from `daygeek-Y700` to `magi-laptop`.
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```
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$ nmcli general hostname magi-laptop
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```
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It’s taking effect without bouncing the below service. However, for safety purpose just restart the systemd-hostnamed service for the changes to take effect.
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```
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$ sudo systemctl restart systemd-hostnamed
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```
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Again run the same nmcli command to check the changed hostname.
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```
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$ nmcli general hostname
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magi-laptop
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```
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### Method-3: Change The HostName Using nmtui Command in Linux
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nmtui is a curses‐based TUI application for interacting with NetworkManager. When starting nmtui, the user is prompted to choose the activity to perform unless it was specified as the first argument.
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Run the following command on terminal to launch the terminal user interface.
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```
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$ nmtui
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```
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Use the `Down Arrow Mark` to choose the `Set system hostname` option then hit the `Enter` button.
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![][3]
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This is old hostname screenshot.
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![][4]
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Just remove the olde one and update the new one then hit `OK` button.
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![][5]
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It will show you the updated hostname in the screen and simple hit `OK` button to complete it.
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![][6]
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Finally hit the `Quit` button to exit from the nmtui terminal.
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![][7]
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It’s taking effect without bouncing the below service. However, for safety purpose just restart the systemd-hostnamed service for the changes to take effect.
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```
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$ sudo systemctl restart systemd-hostnamed
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```
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You can view the updated hostname by running the following command.
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```
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$ hostnamectl
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Static hostname: daygeek-Y700
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Icon name: computer-laptop
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Chassis: laptop
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Machine ID: 31bdeb7b83230a2025d43547368d75bc
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Boot ID: 267f264c448f000ea5aed47263c6de7f
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Operating System: Manjaro Linux
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Kernel: Linux 4.19.20-1-MANJARO
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Architecture: x86-64
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```
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### Method-4: Change The HostName Using /etc/hostname File in Linux
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Alternatively, we can change the hostname by modifying the `/etc/hostname` file. But this method
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requires server reboot for changes to take effect.
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Check the current hostname using /etc/hostname file.
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```
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$ cat /etc/hostname
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daygeek-Y700
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```
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To change the hostname, simple overwrite the file because it’s contains only the hostname alone.
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```
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$ sudo echo "magi-daygeek" > /etc/hostname
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$ cat /etc/hostname
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magi-daygeek
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```
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Reboot the system by running the following command.
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```
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$ sudo init 6
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```
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Finally verify the updated hostname using /etc/hostname file.
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```
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$ cat /etc/hostname
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magi-daygeek
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```
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--------------------------------------------------------------------------------
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via: https://www.2daygeek.com/four-methods-to-change-the-hostname-in-linux/
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作者：[Magesh Maruthamuthu][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.2daygeek.com/author/magesh/
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[b]: https://github.com/lujun9972
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[1]: https://www.2daygeek.com/linux-change-set-hostname/
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[2]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
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[3]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-1.png
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[4]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-2.png
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[5]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-3.png
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[6]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-4.png
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[7]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-5.png
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