User's file creation mask. Set the shell process's
file creation mask to mode.
SYNTAX umask [-p] [-S] [mode] OPTIONS mode File creation mask -S Print the mask in symbolic format -p Output in a form that may be reused as input
The current value of the mask will be printed if mode is omitted,
If mode begins with a digit, it is interpreted as an octal number;
if not, it is interpreted as a symbolic mode mask similar to that accepted by
The return status is zero if the mode is successfully changed or if no mode argument is supplied, and non-zero otherwise.
Note that when the mode is interpreted as an octal number, each number of the umask is subtracted from
7. Thus, a umask of
in permissions of
This is a BOURNE shell command.
"A specialist is someone who does everything else worse" - Ruggiero Ricci
export - Set an environment variable
chmod - Change access permissions
chown - Change file owner and group
readonly - Mark variables/functions as readonly