Read, write, and execute permissions are assigned to each file. The permissions are listed in groups of three. The first group of three permissions references users, the second references group members, and the third references others. The first position of each of the three permissions is the R or read permission, the second is the W or write permission, and the third is the X or execute permission. If any position has a dash, the associated group does not have permission for that category. In this case, the user hasread and write access (rw-). Group members haveread and execute access (r-x). Other people haveexecute only access (–x).