On Windows, open Command Prompt and run `hostname`
On Windows, run `ipconfig /all` and look for the host name
On macOS, open Terminal and run `hostname`
On Linux, open Terminal and run `hostname`
On Linux, run `hostnamectl`
On Unix-like systems, run `uname -n`
In Python, run `import socket; socket.gethostname()`
In PowerShell, run `$env:COMPUTERNAME`