# Startup script

You can specify a script to run before a container or TERR engine is started.

Configuration property | Default setting | Description
--- | --- | ---
`startup.hook.script` | none | The path and name of a startup hook script that runs before any container or TERR engine is started. This value can be empty (for no script) or a relative path from the TERR service working directory. Place the startup script in the directory with the custom.properties file (by default <server-installation-dir>/tomcat/spotfire-bin/config/root/conf/). Note: To specify the path, you must use forward slash (/) regardless of the host operating system. The TERR service can run either a .bat or a .sh file format, depending on the host operating system. On a Linux system, the script must have appropriate permissions before the TERR service executes it. Important: Remember that for any script you write, the line endings must be appropriate for the operating system where the service runs. Many text editors can perform end-of-line (EOL) conversion. You can use the startup script to set environment variables, create directories, download files, or prepare the file system settings in other ways before the service starts. (For example, you can perform Docker commands in the script for a Linux deployment area, or you can run another script. See Containerized Service for more information.)

## Example

- Relative path for a Linux deployment area: conf/mystartupscript.sh
- Relative path for a Windows deployment area: conf/mystartupscript.bat