| 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/linuxkit/virtsock/pkg/hvsock | Package hvsock provides a Go interface to Hyper-V sockets both on Windows and on Linux. |
| github.com/linuxkit/virtsock/pkg/vsock | Package vsock provides the Linux guest bindings to VM sockets. |
| github.com/moby/vpnkit/go/pkg/libproxy | Package libproxy provides a network Proxy interface and implementations for TCP and UDP. |
| log | Package log implements a simple logging package. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| os/signal | Package signal implements access to incoming signals. |
| path | Package path implements utility routines for manipulating slash-separated paths. |
| syscall | Package syscall contains an interface to the low-level operating system primitives. |