What operations does the system perform when executing the 'curl example.com' command in Linux?

When executing the command curl example.com in Linux, the following set of operations occurs:

1. DNS Resolution: curl requests the IP address for the domain example.com from the DNS server.

2. Establishing TCP connection: curl establishes a TCP connection with the server using the obtained IP and port (usually 80 for HTTP).

3. Sending HTTP request: curl constructs and sends an HTTP request (default is GET) to the server.

4. Receiving response: curl receives the HTTP response from the server, including headers and body.

5. Outputting data: curl outputs the received content to standard output (terminal) or to a file if specified.

6. Closing connection: after receiving the response, the connection is closed.

The entire process involves interaction with the OS network stack, socket operations, and handling protocols like DNS, TCP, and HTTP.