Prerequisite:

For ASE to start, the ase_master.key must be present in the /opt/pingidentity/ase/config directory. If you have moved the master key to a secured location for security reasons, copy it to the config directory before executing the start script. You can run ASE as a non-root user also.

Start ASE

Before starting ASE, make sure that nofile limit in /etc/security/limits.conf is set to at least 65535 or higher on the host machine. Run the following command on the ASE host machine to check the nofile limit: 
ulimit -n

Change working directory to bin and run the start.sh script. 

/opt/pingidentity/ase/bin/start.sh
Starting API Security Enforcer 4.0.2...
please see /opt/pingidentity/ase/logs/controller.log for more details

Stop ASE

Change working directory to bin and run the stop.sh script.

/opt/pingidentity/ase/bin/stop.sh -u admin –p admin
checking API Security Enforcer status…sending stop request to ASE. please wait…
API Security Enforcer stopped