sudo: unable to resolve host [hostname]（已解決）

在阿里雲服務器上安裝Java時報錯，因而修改文件/etc/hosts解決。 PS：此時sudo依然能夠繼續運行。node /etc/hosts原文件以下：web 127.0.0.1 localhost # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-l

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