“Linux -Bash -Testverbindung zum Host und Port” Code-Antworten

Linux -Bash -Testverbindung zum Host und Port

## check for tcp port ##
## need bash shell ##
(echo >/dev/tcp/{host}/{port}) &>/dev/null && echo "open" || echo "close"
(echo >/dev/udp/{host}/{port}) &>/dev/null && echo "open" || echo "close"
(echo >/dev/tcp/www.cyberciti.biz/22) &>/dev/null && echo "Open 22" || echo "Close 22"
(echo >/dev/tcp/www.cyberciti.biz/443) &>/dev/null && echo "Open 443" || echo "Close 443"