Unix domain sockets

modulename: unix.ko

configname: CONFIG_UNIX

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Unix domain sockets
In linux kernel since version 2.6.12  
If you say Y here, you will include support for Unix domain sockets;
sockets are the standard Unix mechanism for establishing and
accessing network connections. Many commonly used programs such as
the X Window system and syslog use these sockets even if your
machine is not connected to any network. Unless you are working on
an embedded system or something similar, you therefore definitely
want to say Y here.

Say Y unless you know what you are doing.

source code:
depends
CONFIG_NET