root@Home:/home/myuser/play-2.2.5/helloworld# play
bash: play: command not found

root@Home:/home/myuser# echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/home/myuser/play-2.2.5/play

export PATH="$PATH":/home/myuser/play-2.2.5/play