When starting Applications Manger in Linux with PostgreSQL backend, the following error message is displayed :

Check the permission of AppManager/working/pgsql/data/amdb directory.

Permissions should be u=rwx (0700) or u=rwx,g=rx (0750).

This is due to the PgSQL invalid permissions error.

To solve this issue, navigate to <APM_home>/working/pgsql/data directory in the terminal and execute the following:

chmod 700 amdb  

   (or)

chmod 750 amdb

This will rectify the invalid permissions error.