Script
script 命令接受本地文件作为参数，并逐个重播在其中找到的命令。
The script command accepts a local file as an argument and replays commands found there, one at a time.
从文件读取的行为与在交互式 shell 中完全相同，因此以 // 开头的行被视为注释并被忽略，而以 \ 结尾的行触发行延续。
Reading from the file behaves exactly like inside the interactive shell, so lines starting with // are considered
to be comments and are ignored, while lines ending with \ trigger line continuation.