A String can be used to write a fixed string to the specified file.
Each call of a tool service works within its own specially created sub-directory of a directory specified by the location. When data is written to a file, the file is within the sub-directory for that call.
In the following example "echo Hello World!" is written to the file script.sh.
The command is sh script.sh
You can remove a String by clicking the Remove button to the lower right of its area. This will remove writing to the specified file.
You can add a String by clicking the Add string button.