node：v8.12.0 npm v6.4.1
npm i 安裝到一半會報這樣到錯誤，並終止：
npm WARN deprecated [email protected]: If using 2.x branch, please upgrade to at least 2.1.6 to avoid a serious bug with socket data flow and an import issue introduced in 2.1.0
已殺死.............] - fetchMetadata: sill resolveWithNewModule [email protected] checking installable status
百度問題： https://www.cnblogs.com/owenyang/p/4282283.html
原因：機器內存不足
linux 查看內存命令：free -h
total used free shared buff/cache available
Mem: 488M 227M 5.9M 472K 255M 234M
Swap: 0B 0B 0B
加大內存，繼續npm i