This feature allows the use of Bash Event Designators when using Payara Server’s Asadmin CLI in multimode.
An Event Designator is a reference to a command line entry in the history list, which makes it easy for users to refer and re-use previous asadmin subcommands entries.
| This feature is disabled by default in Payara Server and has to be enabled first before being used. | 
| If this feature is enabled, all occurrences of the \character will be escaped and thus, removed before running the corresponding command. You’ll have to escape these characters and turn them into\\for any commands to be properly parsed. | 
Enabling JLine Event Expansion
To enable support for JLine event designators just set the AS_ADMIN_DISABLE_EVENT_EXPANSION environment variable to false. Follow these steps depending on your operating system: