File permissions

Another basic precaution that all users should take is to ensure that permissions on files that can be accessed by others are set properly.An example of files that could be accessed by others are files in a Unix or Novell account. The Unix and Novell operating systems maintain a set of permissions on each file that establishes permission to read, write, or execute the file by the file owner, a group of users, or all users. If a user does not want other users to read his files, then the permissions for each file must be set to prevent this.