flatpak - is a tool for managing applications and the runtimes they use

To check flatpak version

$ flatpak --version

To List all the Packages

$ flatpak list

To search a package

$ flatpak search <package_name>

To Install a package 

$ flatpak install <package_name>

To uninstall a package

$ flatpak uninstall <package_name>

To check flatpak history

$ flatpak history

To update package

$ flatpak update <package_name>

To check all the Information

$ flatpak info <package_name>

To check flatpak process

$ flatpak ps

To kill flatpak process

$ flatpak kill <process_name>

To repair flatpak installation

$ flatpak repair

To print help options

$ flatpak --help

regards,

T.Dhanasekar