Specify the command to be executed on each slave before Jenkins starts using the slave. This executes with the current directory set to the copied script directory.

Any non-zero exit code will prevent the slave from being used by Jenkins.

Commands typed in here is executed as a shell script (by using the shell you specified in the system config page), but if you need to use a different interpreter, start with "#!" and it'll execute the script with your interpreter of the choice.

The script has the environment variables NODE_TO_SETUP_NAME and NODE_TO_SETUP_LABELS at its disposition. They are set to the NODE_NAME and NODE_LABELS of the slave which is being launched.