CDH安装HDFS时提示：Creating HDFS /tmp directory Command (Create /tmp Directory (347)) has failed，请大神指教！谢谢

错误日志：

Mon Sep  3 10:19:31 EDT 2018
Current working directory: /opt/cloudera-manager/cm-5.15.0/run/cloudera-scm-agent/process/91-hdfs-NAMENODE-createtmp
Launching one-off process: /opt/cloudera-manager/cm-5.15.0/lib64/cmf/service/hdfs/hdfs.sh mkdir /tmp hdfs supergroup 1777
Mon Sep  3 10:19:31 EDT 2018
JAVA_HOME=/usr/local/software/jdk1.7.0_79
using /usr/local/software/jdk1.7.0_79 as JAVA_HOME
using 5 as CDH_VERSION
using /opt/cloudera-manager/cm-5.15.0/run/cloudera-scm-agent/process/91-hdfs-NAMENODE-createtmp as CONF_DIR
using  as SECURE_USER
using  as SECURE_GROUP
CONF_DIR=/opt/cloudera-manager/cm-5.15.0/run/cloudera-scm-agent/process/91-hdfs-NAMENODE-createtmp
CMF_CONF_DIR=/opt/cloudera-manager/cm-5.15.0/etc/cloudera-scm-agent
unlimited
2018-09-03 10:19:38 WARN  NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Directory /tmp does not currently exist.
2018-09-03 10:19:38 WARN  CreateHdfsDirUtil:377 - Connection failed 1 time(s). Trying again...
Directory /tmp does not currently exist.
2018-09-03 10:19:40 WARN  CreateHdfsDirUtil:377 - Connection failed 2 time(s). Trying again...
Directory /tmp does not currently exist.
2018-09-03 10:19:41 WARN  CreateHdfsDirUtil:377 - Connection failed 3 time(s). Trying again...
Directory /tmp does not currently exist.

linux的根目录截图：

tmp 目录如图有阴影，删除重新创建也不成功（删除不掉！！！），通过chmod/chown授权也不成功！请教大神！