[root@namenode ~]# jps
bash: jps: command not found...
[root@namenode ~]# find / -name jps
find: ‘/run/user/1001/gvfs’: Permission denied
[root@namenode ~]# rpm -qa |grep -i jdk
java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64
java-1.8.0-openjdk-1.8.0.65-3.b17.el7.x86_64
java-1.7.0-openjdk-1.7.0.91-2.6.2.3.el7.x86_64
java-1.7.0-openjdk-headless-1.7.0.91-2.6.2.3.el7.x86_64
[root@namenode ~]# yum list *openjdk-devel*
需要安装openjdk-devel包
[root@namenode ~]# yum install java-1.8.0-openjdk-devel.x86_64
[root@namenode ~]# which jps
/usr/bin/jps
[root@namenode ~]# jps
12995 Jps
10985 ResourceManager
11179 NodeManager
10061 NameNode
10301 DataNode
10655 SecondaryNameNode