How a Command Interpreter Is Selected

At submit time, you can specify the command interpreter to use to process the job script file as shown in Figure 3–5. However, if nothing is specified, the configuration variable shell_start_mode determines how the command interpreter is selected:

• If shell_start_mode is set to unix_behavior, the first line of the script file specifies the command interpreter. The first line of the script file must begin with #!. If the first line does not begin with #!, the Bourne Shell sh is used by default.

• For all other settings of shell_start_mode, the default command interpreter is determined by the shell parameter for the queue where the job starts. See Displaying Queues and Queue Properties and the queue_conf(5) man page.