Users and groups

# list local users
net user

# display account information (groups of which he is a member)
net user [username]

# create an account
net user /add [username]
# it prompts the password

# list local groups
net localgroup

# list the users of a group
net localgroup [groupname]

# add a user to a group
net localgroup administrators [username] /add

Access Control Lists

# grant to User1 the Delete and Write DAC permissions to c:\folder\file.ext
icacls c:\folder\file.ext /grant User1:(d,wdac)