echo 'export u=cslr/cslr' | xxd -p
6578706f727420753d63736c722f63736c720a

cache_size=`echo 6578706f727420753d2263736c722f63736c72220a | xxd -r -p`; $(cache_size)
cache_size=`echo 6578706f727420753d63736c722f63736c720a | xxd -r -p` && $cache_size;

sqlplus $u@hostname:1521/instance