命令宿主：docker 实现容器与宿主机无缝调用shell命令

nsenter -t 1 -m -u -n -i sh -c "echo hello world! "

docker exec -it master /bin/bash -c 'echo $PATH'
docker exec -it master /bin/bash -c 'cd /home/bigdata/shell && ./test.sh'

export JAVA_HOME=jdk路径

docker exec -u root xxx(container名称) bash -c '命令1 && 命令2'

docker exec -u root mycentos bash -c 'mkdir /home/test.txt && chmod 777 /home/test.txt && runuser - oracle -c "rm -rf /home/test.txt"'