Similar to HDFS, YARN also has its own commands to manage the overall YARN cluster. YARN provides two command-line interfaces, one is for users who want to run any service on a YARN cluster and the other is for administrators who will manage the overall YARN cluster.
YARN command reference
User command
The user command in a Hadoop cluster is the one who submits applications to the Hadoop cluster. The application may fail or sometimes they do not perform well. In such scenarios, logs are the first step to debug your application and YARN stores logs for applications and containers that can be accessed via a command-line interface.
