This document provides an overview of basic commands for interacting with Hadoop Distributed File System (HDFS) including: 1) ls to list files, mkdir to create directories, touchz to create empty files, copyFromLocal/put to copy from local to HDFS, cat to view file contents 2) copyToLocal/get to copy from HDFS to local, moveFromLocal to move from local to HDFS, cp to copy within HDFS, mv to move within HDFS 3) rmr to recursively delete directories, du to get file sizes, dus to get total directory size, stat to get file status, and setrep to change replication factor.