umask

https://www.linuxtrainingacademy.com/all-umasks/

umask digit	default file permissions	default directory permissions
0	rw	rwx
1	rw	rw
2	r	rx
3	r	r
4	w	wx
5	w	w
6	x	x
7	(no permission allowed)	(no permission allowed)

#value  Source->Result
002       666 -> 664  
002       777 -> 775

022       666 -> 644
022       777 -> 755