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

在阿里云服务器上安装Java时报错,因而修改文件/etc/hosts解决。 PS:此时sudo依然能够继续运行。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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