docker容器里面执行top报“TERM environment variable not set.”

解决：

[hadoop@master ~]$ docker exec -ti 6eca7d27a988 /bin/bash
root@6eca7d27a988:/# top
TERM environment variable not set.

root@6eca7d27a988:/# echo $TERM
dumb

root@6eca7d27a988:/# export TERM=dump