vim - 全局操作
:set nu==> 临时显示行号ctrl + F==> 快速向下翻屏ctrl + B==> 快速向上翻屏:行号==> 跳转到该行行号G==> 跳转到该行
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:set nu ==> 临时显示行号ctrl + F ==> 快速向下翻屏ctrl + B ==> 快速向上翻屏:行号 ==> 跳转到该行行号G ==> 跳转到该行