If you work from the command line often, the cat APIs will be helpful to you. Named after the linux cat command, these APIs are designed to work like *nix command-line tools.command line에서 작업하는 경우, cat API는 매우 유용하다. linux의 cat 명령어에서 이름을 딴, 이 API는 *nix의 command line tool처럼 동작하도록 설계되었다.They provide statistics that are identical to all the previously discussed APIs (Health, node-stats, and so forth..