What is umask 731 command?

Answer 1

The umask 731 command sets the default file creation permissions for new files and directories in a Unix-like operating system. The umask value is subtracted from the system's default permissions, which are typically 666 for files and 777 for directories. In this case, a umask of 731 means that newly created files will have permissions of 636 (read and write for owner, read for group, no permissions for others) and newly created directories will have permissions of 046 (read and execute for owner, no permissions for group and others). This restricts access based on the specified umask settings.