[root@hnd1 bin]# ./start-dfs.sh starting namenode, logging to /home/hadoop/package/hadoop-1.2.1/libexec/../logs/hadoop-root-namenode-hnd1.outhnd2: bash: line 0: cd: /home/hadoop/package/hadoop-1.2.1/libexec/..: 沒有那個文件或目錄hnd3: bash: line 0: cd: /home/hadoop/package/hadoop-1.2.1/libexec/..: 沒有那個文件或目錄hnd2: bash: line 0: cd: /home/hadoop/package/hadoop-1.2.1/libexec/..: 沒有那個文件或目錄hnd2: starting secondarynamenode, logging to /root/hadoop-1.2.1/libexec/../logs/hadoop-root-secondarynamenode-hnd2.outhnd2: Error: JAVA_HOME is not set.JAVA_HOME 已經配置了 [root@hnd1 bin]# java -versionjava version "1.8.0_91"[root@hnd2 libexec]# java -versionjava version "1.8.0_91"Java(TM) SE Runtime Environment (build 1.8.0_91-b14)Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)[root@hnd3 ~]# java -versionjava version "1.8.0_91"Java(TM) SE Runtime Environment (build 1.8.0_91-b14)Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)hadoop-1.2.1/libexec/這個文件 是什么 ？ 我安裝后沒有這個目錄