Linux ssh: Could not resolve hostname XXX: Name or service not known怎么解决

Linux :虚拟机1上的
/etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.8.201 dccheer01

Linux :虚拟机2上的
/etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.8.202 dccheer02

通过IP地址是能相互通的，hostname:就这么不通。

我只想知道怎么解决

都是抄袭

解决方式
Linux :虚拟机1上的
/etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.8.201 dccheer01
192.168.8.202 dccheer02

Linux :虚拟机2上的
/etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.8.201 dccheer01
192.168.8.202 dccheer02