Check the file permissions:
ls -l
file type:
d folder
- regular file
l linked file
c / b device file
file permission:
r read permission
w write permission
x execute permission
Rights group:
User rights (user)
Group permissions (group)
Other privileges (other)
The highest authority:
rwx rwx rwx
Minimum permissions:
--- ---- ---
Owner: owner
It is a group: group
chmod command