RH124 Ch 7: Shared Directories and Permissions

Marketing needs a shared folder where everything new belongs to the team, a drop box anyone can use safely, and a private budget file. Users `meera` (marketing) and `rohan` (not marketing) already exist.

Tasks

1. Make /srv/marketing owned by group marketing, fully accessible to owner and group, closed to others, and make new files created inside it inherit the marketing group.
2. Make /srv/marketing/budget.xlsx owned by meera and group marketing, readable and writable by the owner, readable by the group, and nothing for others.
3. Make /srv/dropbox writable by everyone, but let users delete only their own files there.
4. Set ~/deploy.sh (owned by student) to: owner read/write/execute, group read/execute, others nothing.