ubuntu: ssh: connect to host ubuntu port 22: No route to host

启动HDFS系统的时候出现：
ubuntu: ssh: connect to host ubuntu port 22: No route to host

这里使用的是HDFS伪分布式系统。
这个ubuntu是我在/etc/hosts中设置的。
保持/etc/hosts

代码如下：

(python2.7) [email protected]:~$ ifconfig
enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.103  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::40df:4021:d729:d0c4  prefixlen 64  scopeid 0x20<link>
        ether fc:aa:14:d7:92:85  txqueuelen 1000  (Ethernet)
        RX packets 94189  bytes 94171087 (94.1 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 73981  bytes 12407849 (12.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 3469  bytes 346035 (346.0 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3469  bytes 346035 (346.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

可以看到ifconfig得到的 是192.168.0.103
所以把/etc/hosts修改为

192.168.0.103 ubuntu

关闭HDFS系统然后重启即可