CHMOD

A combination of:

• u user (file owner)
• g group
• o others
• a all (same as ugo)

And combination of:

• r read
• w write
• x execute

with the Permissions:

• = assigned
• + added
• - subtracted

one of the following to copy permissions:

• u user
• g group
• o other

or, to set user id:

• s
  

example: chmod a+rw temp/

to have read/write access to everyone to the temp folder