Chmod + . @ s S t T

By OK -
Each triad
first characterr: readable
second characterw: writable
third characterx: executable
s or t: setuid/setgid or sticky (also executable)
S or T: setuid/setgid or sticky (not executable)
In some permission systems additional symbols in the ls -l display represent additional permission features:

  • + (plus) suffix indicates an access control list that can control additional permissions.
  • . (dot) suffix indicates an SELinux context is present. Details may be listed with the command ls -Z.
  • @ suffix indicates extended file attributes are present.

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