Answer / sbrahman75

UMASK is a Unix environment variable, which automatically
sets file permissions on newly created files

Answer / j.srinivasa rao.

umask is known as user mask value.
the default value of umask is 022.
the advanced value of umask is 027.
when we want more security on files or directories we have
to use umask value.this is simply more security on files
and directories.

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