Example of a Shell Script

Example 3–1 is a simple shell script. The script first compiles the application flow from its Fortran77 source and then runs the application.

Example 3–1 Simple Shell Script

#!/bin/csh
# This is a sample script file for compiling and 
# running a sample FORTRAN program under N1 Grid Engine 6 
cd TEST
# Now we need to compile the program "flow.f" and
# name the executable "flow".
f77 flow.f -o flow

Your local system user's guide provides detailed information about building and customizing shell scripts. You might also want to look at the sh, ksh, csh, or tcsh man page. The following sections emphasize special things that you should consider when you prepare batch scripts for the grid engine system.

In general, you can submit to the grid engine system all shell scripts that you can run from your command prompt by hand. Such shell scripts must not require a terminal connection, and the scripts must not need interactive user intervention. The exceptions are the standard error and standard output devices, which are automatically redirected. Therefore, Example 3–1 is ready to be submitted to the grid engine system and the script will perform the desired action.