Process management with supervisor in Raspberry Pi - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Supervisor in process management?

Supervisor is a tool that helps you start, stop, and monitor processes automatically on your Raspberry Pi. It keeps your programs running and restarts them if they crash.

beginner

How do you install Supervisor on a Raspberry Pi?

You install Supervisor by running sudo apt-get update and then sudo apt-get install supervisor. This sets up the tool to manage your processes.

intermediate

What is a Supervisor configuration file used for?

It tells Supervisor which programs to manage, how to start them, and what to do if they stop. You write the program details in a file usually inside /etc/supervisor/conf.d/.

beginner

How does Supervisor help if a process crashes?

Supervisor automatically restarts the crashed process so your program keeps running without you needing to do anything.

intermediate

What command do you use to reload Supervisor after changing config files?

You run sudo supervisorctl reread to read new configs, then sudo supervisorctl update to apply changes and start or stop processes as needed.

What is the main purpose of Supervisor on a Raspberry Pi?

A To manage and keep processes running automatically

B To update the Raspberry Pi operating system

C To connect to the internet

D To write Python programs

Supervisor manages processes by starting, stopping, and restarting them automatically.

Where do you usually place Supervisor configuration files?

A /var/log/

B /etc/supervisor/conf.d/

C /usr/bin/

D /home/pi/

Supervisor configuration files are placed in /etc/supervisor/conf.d/ to define managed programs.

Which command reloads Supervisor configurations after editing?

A sudo supervisorctl reread

B sudo apt-get update

C sudo reboot

D sudo systemctl start

The command 'sudo supervisorctl reread' tells Supervisor to read new or changed config files.

If a process crashes, what does Supervisor do?

A Sends an email to the user

B Deletes the process files

C Restarts the process automatically

D Shuts down the Raspberry Pi

Supervisor restarts crashed processes to keep them running without manual intervention.

How do you install Supervisor on Raspberry Pi?

A sudo pip install supervisor

B sudo install supervisor

C sudo supervisor install

D sudo apt-get install supervisor

You install Supervisor using the package manager with 'sudo apt-get install supervisor'.

Explain how Supervisor helps manage processes on a Raspberry Pi.

Think about what happens if a program stops unexpectedly.

Describe the steps to add a new program to Supervisor and make it run automatically.

Focus on configuration and commands to apply changes.