[English] Debian Almquist Shell (dash) hostname usage: Display or set the system’s hostname

Overview

The hostname command in the Debian Almquist Shell (dash) is used to display or set the system’s hostname. The hostname is a label that identifies a device on a network, making it easier to manage and communicate with other devices.

Usage

The basic syntax of the hostname command is as follows:

hostname [options] [arguments]

Common Options

-f, --fqdn: Display the fully qualified domain name (FQDN) of the system.
-i, --ip-address: Show the IP address associated with the hostname.
-s, --short: Display the short hostname (the part before the first dot).
-V, --version: Show the version of the hostname command.

Common Examples

Here are some practical examples of using the hostname command:

Display the current hostname:
```
hostname
```
Show the fully qualified domain name (FQDN):
```
hostname -f
```
Display the short hostname:
```
hostname -s
```
Show the IP address of the hostname:
```
hostname -i
```
Set a new hostname (requires superuser privileges):
```
sudo hostname new-hostname
```

Tips

Always check your current hostname before making changes to avoid confusion.
Use the -f option to ensure you are aware of the full network identity of your machine.
Remember that changing the hostname may require a restart of certain services or the system itself to take effect properly.