How to use the pstree command: Linux tip

The video tutorial introduces the PS3 command in Linux, which provides a hierarchical view of running processes, showing their relationships and which processes have spawned others. It demonstrates a simple example using the PS3 command to display a process tree and a more complex example showing processes run by a specific user. The tutorial also covers viewing processes run by the root user, highlighting the hierarchical nature of the output and how system D initiates other processes.

What is the primary function of the PS3 command in Linux?

• To change file permissions

• To create a new user

• To display running processes and their relationships

• To list all files in a directory

In the simple example, what does the PS3 command display?

• All users logged into the system

• The current directory path

• Processes spawned by the login shell

• The system's uptime

When using the PS3 command with a username, what information is displayed?

• All files owned by the user

• All processes run by that user

• The user's login history

• The user's home directory

What additional information is shown when viewing processes run by the root user?

• The root's email address

• The root's password

• A limited number of processes in a tree format

• Only the root's login time

What does the hierarchical view of processes help to clarify?

• The system's memory usage

• The relationships between running tasks

• The file structure of the system

• The network configuration