Keytool utility not available

I know that in order to use keytool, JDK must be installed -- which it is in my server -- but the keytool utility is not available. [root@Linux ~]$ java -version openjdk version "1.8.0_181" OpenJDK Runtime Environment (build 1.8.0_181-b13) OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode) [root@Linux ~]$ [root@Linux ~]$ which keytool /usr/bin/which: no keytool in (/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/opc/bin:/sbin:/usr/sbin) [root@Linux ~]$ [root@Linux ~]$ locate keytool /etc/alternatives/keytool /etc/alternatives/keytool.1.gz /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.181-3.b13.el6_10.x86_64/jre/bin/keytool /usr/share/man/man1/keytool-java-1.8.0-openjdk-1.8.0.181-3.b13.el6_10.x86_64.1.gz /usr/share/man/man1/keytool.1.gz How can I fix this?