[root@localhost META-INF]# systemctl start tomcat Job for tomcat.service failed because the control process exited with error code. See "systemctl status tomcat.service" and "journalctl -xe" for details. [root@localhost META-INF]# systemctl status tomcat.service ● tomcat.service - Tomcat Loaded: loaded (/usr/lib/systemd/system/tomcat.service; disabled; vendor preset: disabled) Active: failed (Result: exit-code) since Tue 2019-02-19 12:12:06 EST; 11s ago Process: 7551 ExecStart=/usr/local/tomcat/bin/startup.sh (code=exited, status=1/FAILURE) Feb 19 12:12:06 localhost.localdomain systemd[1]: Starting Tomcat... Feb 19 12:12:06 localhost.localdomain startup.sh[7551]: Neither the JAVA_HOME nor the JRE_HOME environment variable is defined Feb 19 12:12:06 localhost.localdomain startup.sh[7551]: At least one of these environment variable is needed to run this program Feb 19 12:12:06 localhost.localdomain systemd[1]: tomcat.service: control process exited, code=exited status=1 Feb 19 12:12:06 localhost.localdomain systemd[1]: Failed to start Tomcat. Feb 19 12:12:06 localhost.localdomain systemd[1]: Unit tomcat.service entered failed state. Feb 19 12:12:06 localhost.localdomain systemd[1]: tomcat.service failed.