Command returns the Cmd struct to execute the named program with the given arguments.

CommandContext is like Command but includes a context.

LookPath searches for an executable binary named file in the directories named by the PATH environment variable.

ErrNotFound is the error resulting if a path search failed to find an executable file.

Cmd represents an external command being prepared or run.

Error records the name of a binary that failed to be executed and the reason it failed.

An ExitError reports an unsuccessful exit by a command.