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Managing file permissions for POSIX files is much like managing them in a single-protocol UNIX environment. A chmod can be run over an NFS export or from the PowerScale CLI with the same result. The chmod options are the same as in a standard UNIX environment. As the POSIX permission changes after a chmod, the synthetic ACL changes automatically, with a maximum of three DACLs, as shown in the following figure:
Figure 27. POSIX file permissions management
In the figure, after the chmod 755 is run, the POSIX permission and synthetic ACL are updated as an additional DACL is displayed.