sudo:无法解析主机(名称已添加到 /etc/hosts)

dba*_*rev 14 sudo hosts

每当我使用时sudo,我都会得到这个:

sudo: unable to resolve host dave00-G31M-ES2L
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这是我的/etc/hosts

dave00@dave00-G31M-ES2L:~$ cat /etc/hosts
127.0.0.1   localhost
127.0.1.1   dave00-G31M-ES2

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
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我已经注销/登录。我该如何解决这个问题?