At least in my Bash (4.2.25(1)), there seems to be a difference between "2>&1|" and "2>&1 |" – the latter works as expected, whereas the former doesn’t give any

At least in my Bash (4.2.25(1)), there seems to be a difference between "2>&1|" and "2>&1 |" – the latter works as expected, whereas the former doesn’t give any output. $ echo -e "quit\n" | openssl s_client -connect chubig.net:993 -tlsextdebug 2>&1| grep 'TLS server extension "heartbeat" (id=15), len=1' $ echo -e "quit\n" | openssl s_client -connect chubig.net:993 -tlsextdebug 2>&1 | grep 'TLS server extension "heartbeat" (id=15), len=1' TLS server extension "heartbeat" (id=15), len=1 $ Does anybody know why?