Shell brick

A Shell brick runs the operating system commands (DOS or shell) that you specify.

Shell bricks are frequently used to do pre- or post-processing, or for tasks for which no standard brick exists. Each line in a Shell brick is executed individually in sequence.

It is possible to write Shell bricks that run scripts that are external to the control script. If you write such a Shell brick, the external script it references must be stored locally on the machine on which it will be executed.

Shell brick settings

Setting	Description
`stdout`	Where to redirect `stdout` for the brick. By default, `stdout` is sent to the screen. Specifying a value for `stdout` overrides the `stdout_base` setting.
`stderr`	Where to redirect `stderr` for the brick. By default, `stderr` is sent to the screen. Specifying a value for `stderr` overrides the `stderr_base` setting.

The following is a UNIX example of a Shell brick called arch01. It removes the oldest archive file and rolls other versions back to make room for a new version.

arch01 : Shell
	rm /archive/4/*
	mv /archive/3/example1* /archive/4/
	mv /archive/2/example1* /archive/3/
	mv /archive/1/example1* /archive/2/
	ln /run/example1* /archive/1/