I was using sonarqube 7.2 version.It was running properly on port 8443 but accidentally the whole sonarqube-7.2 folder got deleted and then I was not able to stop it as there was no sonar.sh available.I did netstat -tnlp , process was still running on port 8443 then I killed the process forcefully.
Now when I have downloaded a different version and tried to install it … It is not running,its being killed automatically with errors:
max virtual memory areas vm.max_map_count  is too low, increase to at least 
I have done all systems settings according to this error still its coming.
Can anyone help with this ASAP with highest priority.???