title: issue with informatica variables in unix
body: <p>I have a issue with informatica environmental variables.
  the variables are not getting displayed in unix.
  [root@******]# su infadm
  bash-4.2$ echo $PMEXTERNALPROCDIR</p>
  
  <p>bash-4.2$</p>
  
  <p>I check the variables session in admin console and all the path are defined correctly.
  what could be the reason and what should i do if i have to see the value?</p>