@CliCommand(value = PREFIX + "cat", help = "Copy source paths to stdout")
	public void cat(
			@CliOption(key = { "", PATH }, mandatory = true, unspecifiedDefaultValue = ".", help = "file name to be shown") final String path) {
		runCommand("-cat", path);
	}
HDFS shell commands

@author Jarred Li
@author Glenn Renfro
spring-xd-shell/src/main/java/org/springframework/xd/shell/hadoop/FsShellCommands.java