$ curl cheat.sh/

 cheat.sheets:hostname 
# hostname
# Show or set the system's host name.

# Display the current hostname of the system
hostname

# Set a new hostname for the system (requires administrative privileges)
sudo hostname new-hostname

# Display the short hostname (without any domain information)
hostname -s

# Display the domain name of the system
hostname -d

# Display the fully qualified domain name (FQDN) of the system
hostname -f

# Display the IP address(es) of the host
hostname -I

# Display all network addresses of the host
hostname -A

 tldr:hostname 
# hostname
# Show or set the system's host name.
# More information: <https://manned.org/hostname>.

# Show current host name:
hostname

# Show the network address of the host name:
hostname -i

# Show all network addresses of the host:
hostname -I

# Show the FQDN (Fully Qualified Domain Name):
hostname --fqdn

# Set current host name:
hostname new_hostname

$

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