Test conditions syntax

in some case, their should be some condition to check and satisfy. to execute linux cmds in the script.

At that time this Tests concept play an important role.

Example syntax:                                                          

                                                      if [ -d /usr/sap/<sid> ]                                               

then                    

command1

command2

command3

fi                    

               

Note: here fi is used to close the if condition.