- sudo 出现unable to resolve host 解决方法
Ubuntu环境, 假设这台机器名字叫abc(机器的hostname), 每次执行sudo 就出现这个警告讯息:
sudo: unable to resolve host abc
虽然sudo 还是可以正常执行, 但是警告讯息每次都出来,而这只是机器在反解上的问题, 所以就直接从/etc/hosts 设定, 让abc(hostname) 可以解回127.0.0.1 的IP 即可.
/etc/hosts 原始内容
127.0.0.1 localhost
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts在127.0.0.1 localhost 后面加上主机名称(hostname) 即可, vim /etc/hosts 内容修改成如下:
127.0.0.1 localhost
127.0.0.1 abc #注意这里是主机名
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts