To show all entries for files, including those that begin with a . List one entry per line using the -l flag. The -C flag is the default format when output is to a tty. If this variable is not set, the command reads the terminfo file. If the ls command cannot determine the number of character positions by either of these methods, it uses a default value of 80.
Entry is a local socket.
The next nine characters are divided into three sets of three characters each. The first three characters show the owner's permission. The next set of three characters shows the permission of the other users in the group. The last set of three characters shows the permission of anyone else with access to the file. The three characters in each set show read, write, and execute permission of the file.