Variables

Environment variables

Available to this shell process and any child processes
Examples include $HOME, $MAIL, $PATH, $DISPLAY
Export the variable using 'export'

          ~/build$ set | grep bld
          bld=/home/george/build

          ~/build$ /usr/bin/env | grep bld

          ~/build$ export bld

          ~/build$ /usr/bin/env | grep bld
          bld=/home/george/build