systemctl list-timers

famille_perms.timer

[Unit]
Description=Execute famille-perms.service tous les jours
 
[Timer]
OnCalendar=daily
 
[Install]
WantedBy=timers.target

famille_perms.service

[Unit]
Description=Permissions for /media/nas-famille
 
[Service]
Type=oneshot
ExecStart=/usr/bin/find /media/stockage/famille/ -type f -exec /bin/chmod ug+rw {} \;
ExecStart=/usr/bin/find /media/stockage/famille/ -type d -exec /bin/chmod ug+rwx {} \;
ExecStart=/usr/bin/find /media/stockage/famille/ -exec /bin/chmod o-rwx {} \;
ExecStart=/usr/bin/find /media/stockage/famille/ -type d -exec /bin/chmod g+s {} \;
ExecStart=/usr/bin/find /media/stockage/famille/ -exec /bin/chown root.famille {} \;

sudo systemctl enable famille_perms.timer
sudo systemctl start famille_perms.timer