The user who owns it (u)
Other users in the file's group (g)
Other users not in the file's group (o)
All users (a)
Read (r),
Write (w),
Execute (or access for directories) (x),
Execute only if the file is a directory or already has execute permission for some user (X),
Set user or group ID on execution (s),
Save program text on swap device (t),
The permissions that the user who owns the file currently has for it (u),
The permissions that other users in the file's group have for it (g),
Permissions that other users not in the file's group have for it (o).
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