Shell 01 ex01 print_groups | C Piscine 1337

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resources
User Groups and Permissions in Linux
https://www.section.io/engineering-education/user-groups-and-permissions-linux/
How to manage users and groups in Linux
https://www.redhat.com/sysadmin/linux-user-group-management
Using Shell Variables
https://www.tutorialspoint.com/unix/unix-using-variables.htm
Linux tr Command with Examples
https://phoenixnap.com/kb/linux-tr