[tt@vddd conf]$ java -version

openjdk version "1.8.0_65"

OpenJDK Runtime Environment (build 1.8.0_65-b17)

OpenJDK -Bit Server VM (build 25.65-b01, mixed mode)

[tt@vddd conf]$ echo $JAVA_HOME

[tt@vddd conf]$ echo $PATH

/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/app/tt/.local/bin:/app/tt/bin

[tt@vddd conf]$ whereis java

java: /usr/bin/java /usr/lib/java /etc/java /usr/share/java /usr/share/man/man1/java..gz

[tt@vddd conf]$ which java

/usr/bin/java

[tt@vddd conf]$ cd /usr/bin/java

-bash: cd: /usr/bin/java: Not a directory

[tt@vddd conf]$ ls -lrt /usr/bin/java

lrwxrwxrwx.  root root  Oct  : /usr/bin/java -> /etc/alternatives/java

[tt@vddd conf]$  ls -lrt /etc/alternatives/java

lrwxrwxrwx.  root root  Oct  : /etc/alternatives/java -> /usr/lib/jvm/java-1.8.-openjdk-1.8.0.65-.b17.el7.x86_64/jre/bin/java

[tt@vddd conf]$ cd /usr/lib/jvm

[tt@vddd jvm]$ ls

java-1.7.-openjdk-1.7.0.91-2.6.2.3.el7.x86_64  jre-1.7.                                      jre-1.8.                                    jre-openjdk

java-1.8.-openjdk-1.8.0.65-.b17.el7.x86_64    jre-1.7.-openjdk                              jre-1.8.-openjdk

jre                                             jre-1.7.-openjdk-1.7.0.91-2.6.2.3.el7.x86_64  jre-1.8.-openjdk-1.8.0.65-.b17.el7.x86_64

[tt@vddd jvm]$