cmdline change permissions

runas /user:ANDERS\johnpfeiffer cmd
    change permissions: 
    ECHO Y| CACLS /g <username>:<permission>

Add Read-Only permission to a single file CACLS myfile.txt /E /G "Power Users":R

Add Full Control permission to a second group of users CACLS myfile.txt /E /G "FinanceUsers":F

Now revoke the Read permissions from the first group CACLS myfile.txt /E /R "Power Users"

Now give the first group Full-control: CACLS myfile.txt /E /G "Power Users":F

Give the Finance group Full Control of a folder and all sub folders CACLS c:\docs\work /E /T /C /G "FinanceUsers":F