title: SonarQube is unable to start on CentOS: systemd returns (code=exited, status=203/EXEC)
body: <p>Following <a href="https://www.vultr.com/docs/how-to-install-sonarqube-on-centos-7" rel="nofollow noreferrer">https://www.vultr.com/docs/how-to-install-sonarqube-on-centos-7</a> to install SonarQube on my CentOS. 
  When I'm trying to start the SonarQube via <code>sudo systemctl start sonar</code> it is giving below error:</p>
  
  <pre><code>Job for sonar.service failed because the control process exited with error code. See "systemctl status sonar.service" and "journalctl -xe" for details.
  </code></pre>
  
  <p>Output of systemctl status sonar.service:</p>
  
  <pre><code>sonar.service - SonarQube service
     Loaded: loaded (/etc/systemd/system/sonar.service; disabled; vendor preset: disabled)
     Active: failed (Result: start-limit) since Wed 2019-04-24 16:56:39 UTC; 19s ago
    Process: 23573 ExecStart=/opt/sonarqube/bin/linux-x86-64/sonar.sh start (code=exited, status=203/EXEC)
  
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: sonar.service: control process exited, code=exited status=203
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Failed to start SonarQube service.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Unit sonar.service entered failed state.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: sonar.service failed.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: sonar.service holdoff time over, scheduling restart.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: start request repeated too quickly for sonar.service
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Failed to start SonarQube service.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Unit sonar.service entered failed state.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: sonar.service failed.
  </code></pre>
  
  <p>Output of journalctl -xe:</p>
  
  <pre><code>Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Starting SonarQube service...
  -- Subject: Unit sonar.service has begun start-up
  -- Defined-By: systemd
  -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
  --
  -- Unit sonar.service has begun starting up.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[23573]: Failed at step EXEC spawning /opt/sonarqube/bin/linux-x86-64/sona
  -- Subject: Process /opt/sonarqube/bin/linux-x86-64/sonar.sh could not be executed
  -- Defined-By: systemd
  -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
  --
  -- The process /opt/sonarqube/bin/linux-x86-64/sonar.sh could not be executed and failed.
  --
  -- The error number returned by this process is 2.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: sonar.service: control process exited, code=exited status=203
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Failed to start SonarQube service.
  -- Subject: Unit sonar.service has failed
  -- Defined-By: systemd
  -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
  --
  -- Unit sonar.service has failed.
  --
  -- The result is failed.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Unit sonar.service entered failed state.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: sonar.service failed.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: sonar.service holdoff time over, scheduling restart.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: start request repeated too quickly for sonar.service
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Failed to start SonarQube service.
  -- Subject: Unit sonar.service has failed
  -- Defined-By: systemd
  -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
  --
  -- Unit sonar.service has failed.
  --
  -- The result is failed.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: Unit sonar.service entered failed state.
  Apr 24 16:56:39 ip-172-31-13-96.ap-south-1.compute.internal systemd[1]: sonar.service failed.
  </code></pre>