Create setenvironment.md

howto/setenvironment.md

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+# How to set an environment variable prior to calling a script using QSHEXEC or QSHBASH
+It might be handy to be able to know if a particular job is calling a script such as a PHP, Python or other Bash script. 
+
+Here's a couple of options for setting environment variables for your scripts to pick up. 
+
+Add the environment variable from the IBM i CL or RPG job using the ADDENVVAR CL command or some other tool.   
+
+This example adds an env variable named CALLEDBY and then lists it for display by calling env from the PASE job.
+```
+ADDENVVAR ENVVAR(CALLEDBY) VALUE(QSHONI)
+
+QSHONI/QSHBASH CMDLINE(env) DSPSTDOUT(*YES)
+```
+
+This example adds an env variable named CALLEDBY by calling the export command on the QSH/PASE command line and then lists it for display by calling env from the PASE job.  
+```
+QSHONI/QSHBASH CMDLINE('export CALLEDBY=QSHONI;env') DSPSTDOUT(*YES) 
+```