socket programming in bash

關於Bash的Socket部份您可以在man page中看到這段描述：

/dev/tcp/host/port
        If host is a valid hostname or Internet address, and port is an integer
        port number or service name, bash attempts to open a TCP connection to
        the corresponding socket.

/dev/udp/host/port
        If host is a valid hostname or Internet address, and port is an integer
        port number or service name, bash attempts to open a UDP connection to 
        the corresponding socket.

用一個簡單的例子就會懂了