From d5f60b3b62871078da0572d2ac3fe5a1d7d99a9f Mon Sep 17 00:00:00 2001 From: darksun Date: Mon, 18 Feb 2019 16:48:36 +0800 Subject: [PATCH] =?UTF-8?q?=E9=80=89=E9=A2=98:=2020190215=204=20Methods=20?= =?UTF-8?q?To=20Change=20The=20HostName=20In=20Linux=20sources/tech/201902?= =?UTF-8?q?15=204=20Methods=20To=20Change=20The=20HostName=20In=20Linux.md?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...Methods To Change The HostName In Linux.md | 227 ++++++++++++++++++ 1 file changed, 227 insertions(+) create mode 100644 sources/tech/20190215 4 Methods To Change The HostName In Linux.md diff --git a/sources/tech/20190215 4 Methods To Change The HostName In Linux.md b/sources/tech/20190215 4 Methods To Change The HostName In Linux.md new file mode 100644 index 0000000000..ad95e05fae --- /dev/null +++ b/sources/tech/20190215 4 Methods To Change The HostName In Linux.md @@ -0,0 +1,227 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (4 Methods To Change The HostName In Linux) +[#]: via: (https://www.2daygeek.com/four-methods-to-change-the-hostname-in-linux/) +[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/) + +4 Methods To Change The HostName In Linux +====== + +We had written an article yesterday in our website about **[changing hostname in Linux][1]**. + +Today we are going to show you that how to change the hostname using different methods. You can choose the best one for you. + +systemd systems comes with a handy tool called `hostnamectl` that allow us to manage the system hostname easily. + +It’s changing the hostname instantly and doesn’t required reboot when you use the native commands. + +But if you modify the hostname manually in any of the configuration file that requires reboot. + +In this article we will show you the four methods to change the hostname in systemd system. + +hostnamectl command allows to set three kind of hostname in Linux and the details are below. + + * **`Static:`** It’s static hostname which is added by the system admin. + * **`Transient/Dynamic:`** It’s assigned by DHCP or DNS server at run time. + * **`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”. + + + +It can be done in the following four methods. + + * **`hostnamectl Command:`** hostnamectl command is controling the system hostname. + * **`nmcli Command:`** nmcli is a command-line tool for controlling NetworkManager. + * **`nmtui Command:`** nmtui is a text User Interface for controlling NetworkManager. + * **`/etc/hostname file:`** This file is containing the static system hostname. + + + +### Method-1: Change The HostName Using hostnamectl Command in Linux + +hostnamectl may be used to query and change the system hostname and related settings. + +Simple run the `hostnamectl` command to view the system hostname. + +``` +$ hostnamectl +or +$ hostnamectl status + + Static hostname: daygeek-Y700 + Icon name: computer-laptop + Chassis: laptop + Machine ID: 31bdeb7b83230a2025d43547368d75bc + Boot ID: 267f264c448f000ea5aed47263c6de7f + Operating System: Manjaro Linux + Kernel: Linux 4.19.20-1-MANJARO + Architecture: x86-64 +``` + +If you would like to change the hostname, use the following command format. + +**The general syntax:** + +``` +$ hostnamectl set-hostname [YOUR NEW HOSTNAME] +``` + +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`. + +``` +$ hostnamectl set-hostname magi-laptop +``` + +You can view the updated hostname by running the following command. + +``` +$ hostnamectl + Static hostname: magi-laptop + Icon name: computer-laptop + Chassis: laptop + Machine ID: 31bdeb7b83230a2025d43547368d75bc + Boot ID: 267f264c448f000ea5aed47263c6de7f + Operating System: Manjaro Linux + Kernel: Linux 4.19.20-1-MANJARO + Architecture: x86-64 +``` + +### Method-2: Change The HostName Using nmcli Command in Linux + +nmcli is a command-line tool for controlling NetworkManager and reporting network status. + +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. + +Use the following format to view the current hostname using nmcli. + +``` +$ nmcli general hostname +daygeek-Y700 +``` + +**The general syntax:** + +``` +$ nmcli general hostname [YOUR NEW HOSTNAME] +``` + +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`. + +``` +$ nmcli general hostname magi-laptop +``` + +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. + +``` +$ sudo systemctl restart systemd-hostnamed +``` + +Again run the same nmcli command to check the changed hostname. + +``` +$ nmcli general hostname +magi-laptop +``` + +### Method-3: Change The HostName Using nmtui Command in Linux + +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. + +Run the following command on terminal to launch the terminal user interface. + +``` +$ nmtui +``` + +Use the `Down Arrow Mark` to choose the `Set system hostname` option then hit the `Enter` button. +![][3] + +This is old hostname screenshot. +![][4] + +Just remove the olde one and update the new one then hit `OK` button. +![][5] + +It will show you the updated hostname in the screen and simple hit `OK` button to complete it. +![][6] + +Finally hit the `Quit` button to exit from the nmtui terminal. +![][7] + +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. + +``` +$ sudo systemctl restart systemd-hostnamed +``` + +You can view the updated hostname by running the following command. + +``` +$ hostnamectl + Static hostname: daygeek-Y700 + Icon name: computer-laptop + Chassis: laptop + Machine ID: 31bdeb7b83230a2025d43547368d75bc + Boot ID: 267f264c448f000ea5aed47263c6de7f + Operating System: Manjaro Linux + Kernel: Linux 4.19.20-1-MANJARO + Architecture: x86-64 +``` + +### Method-4: Change The HostName Using /etc/hostname File in Linux + +Alternatively, we can change the hostname by modifying the `/etc/hostname` file. But this method +requires server reboot for changes to take effect. + +Check the current hostname using /etc/hostname file. + +``` +$ cat /etc/hostname +daygeek-Y700 +``` + +To change the hostname, simple overwrite the file because it’s contains only the hostname alone. + +``` +$ sudo echo "magi-daygeek" > /etc/hostname + +$ cat /etc/hostname +magi-daygeek +``` + +Reboot the system by running the following command. + +``` +$ sudo init 6 +``` + +Finally verify the updated hostname using /etc/hostname file. + +``` +$ cat /etc/hostname +magi-daygeek +``` + +-------------------------------------------------------------------------------- + +via: https://www.2daygeek.com/four-methods-to-change-the-hostname-in-linux/ + +作者：[Magesh Maruthamuthu][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://www.2daygeek.com/author/magesh/ +[b]: https://github.com/lujun9972 +[1]: https://www.2daygeek.com/linux-change-set-hostname/ +[2]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7 +[3]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-1.png +[4]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-2.png +[5]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-3.png +[6]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-4.png +[7]: https://www.2daygeek.com/wp-content/uploads/2019/02/four-methods-to-change-the-hostname-in-linux-5.png