umask
Command English original intent: the user file-creation mask
Command the path: shell built-in commands
Execute permissions: All users
Syntax: umask [-S]
-S 以rwx形式显示新建文件缺省权限
Description: display the default permission settings file
The default file created is no x authority
example:
$ umask -S
u=rwx,g=rx,o=rx