error.go
package hostsfile
import (
"errors"
)
var (
ErrHostAddressIsRequired = errors.New("host address is required")
ErrHostRequireAtLeastOneHostname = errors.New("host require at least one hostname")
ErrUnsupportedOperatingSystem = errors.New("unsupported operating system")
ErrHostNotFound = errors.New("host not found")
)