| crypto/rand | Package rand implements a cryptographically secure random number generator. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/rackspace/gophercloud | Package gophercloud provides a multi-vendor interface to OpenStack-compatible clouds. |
| github.com/rackspace/gophercloud/osutil | |
| os | Package os provides a platform-independent interface to operating system functionality. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| time | Package time provides functionality for measuring and displaying time. |