Nifi is not startgin

[#1]

Hi to all..

After set up nifi 1.9.2 I have this error.

Exception in thread "main" java.io.IOException: /armstrong/nifi-1.9.2/run directory does not have read/write privilege
at org.apache.nifi.util.file.FileUtils.ensureDirectoryExistAndCanAccess(FileUtils.java:90)
at org.apache.nifi.bootstrap.RunNiFi.getBootstrapFile(RunNiFi.java:360)
at org.apache.nifi.bootstrap.RunNiFi.getStatusFile(RunNiFi.java:371)
at org.apache.nifi.bootstrap.RunNiFi.loadProperties(RunNiFi.java:384)
at org.apache.nifi.bootstrap.RunNiFi.getCurrentPort(RunNiFi.java:490)
at org.apache.nifi.bootstrap.RunNiFi.start(RunNiFi.java:907)
at org.apache.nifi.bootstrap.RunNiFi.main(RunNiFi.java:217)

[#2]

Hello

Looks like a permission issue, try below

sudo service nifi start