Linux commands: Understanding and Using `umask`
A comprehensive guide to the umask command, its functionality, and how to effectively set default file permissions. When creating a file, it is not always necessary to specify permissions right away, as default permissions are assigned. These default permissions can be controlled and modified using the umask command. To check the current umask value, simply type umask without any arguments. The command will display the current umask value, such as 0022....