更改hostname
暫時更改
sudo hostname NEWNAME
永久更改
/etc/hostname 只有一列: hostname 改掉即可
/etc/hosts 改掉名子那列,第2列 127.0.0.1 localhost 127.0.1.1 fufeng ::1 localhost ip6-localhost ip6-loopback ff02::1 ip6-allnodes ff02::2 ip6-allrouters
清除DNS
sudo systemd-resolve --flush-caches