• The usual way to create a Unix domain or TCP socket is programatically, via the mknod or socket system calls. The mknod command will not allow you to create a socket.

From the command line, use the socket package

• If you wish to create a Unix/TCP socket from the command-line, try the socket command from the socket package (install it first). Summarizing its man page description:

  
  
  

  
  

  Socket creates an Internet domain TCP or a UNIX domain stream socket and connects it to stdin and stdout.

  
  

Examples of socket usage (from man page)

1. socket -v coma.cs.tu-berlin.de nntp

   
   
   

   connects to the nntp port (port 119) of coma.cs.tu-berlin.de
   (130.149.28.10).




2. socket -sl 3425

   
   
   

   creates a server socket on port 3425 on the local host and waits for a
   connection. After a connection has been closed, a new connection is
   accepted.




3. socket -wslqvp "echo Socket! " 1938

   
   
   

   creates a server socket on port 1938 on the local host and waits for a
   connection. When a connection is accepted, the string "Socket!" is
   written to the socket. No data is read from the socket and written to
   the finger program. The connection is closed when an end-of-file
   condition at the standard output of the program occurs. Then a new
   connection is accepted.