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umask

Manage the read/write/execute permissions that are masked out (i.e. restricted) for newly created files by the user.

Display the current mask in octal notation:

umask

Display the current mask in symbolic (human-readable) mode:

umask -S

Change the mask symbolically to allow read permission for all users (the rest of the mask bits are unchanged):

umask {{a+r}}

Set the mask (using octal) to restrict no permissions for the file's owner, and restrict all permissions for everyone else:

umask {{077}}