pogo@pogo-desktop:~/Téléchargements/bitcoin-0.3.19-linux/bitcoin-0.3.19/bin/32$ sudo sh bitcoin
bitcoin: 1: ELFB4tl4: not found
bitcoin: 7: Syntax error: "(" unexpected (expecting ")")
It's not a shell script, but a binary executable ! And you don't have to sudo it.
So you must run :
pogo@pogo-desktop:~/Téléchargements/bitcoin-0.3.19-linux/bitcoin-0.3.19/bin/32$ ./bitcoin