| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/creack/pty | Package pty provides functions for working with Unix terminals. |
| github.com/gliderlabs/ssh | Package ssh wraps the crypto/ssh package with a higher-level API for building SSH servers. |
| io | Package io provides basic interfaces to I/O primitives. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| os/exec | Package exec runs external commands. |
| syscall | Package syscall contains an interface to the low-level operating system primitives. |
| unsafe | Package unsafe contains operations that step around the type safety of Go programs. |