Shell Variables

 Write shell scripts to show the following 

( you can write menu driven programs)
 Currently logged user and his logname  
( logname, id -un, echo $USER)
 Your current shell ( echo $SHELL)
 Your home directory ( echo $HOME)
 Your operating system type (echo $OSTYPE)
 Your current path setting ( echo $PATH)
 Your current working directory ( echo $PWD )

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