You can’t set netcat to wait until some port is open, so you have to add part for waiting before next check is made. Try this: #!/bin/bash echo “Waiting jenkins to launch on 8080…” while ! nc -z localhost 8080; do sleep 0.1 # wait for 1/10 of the second before check again done echo … Read more
Using your hosts network as network for your containers via –net=host or in docker-compose via network_mode: host is one option but this has the unwanted side effect that (a) you now expose the container ports in your host system and (b) that you cannot connect to those containers anymore that are not mapped to your … Read more
If you are using bash, you might as well write echo -n “hello” >/dev/udp/localhost/8000 and avoid all the idiosyncrasies and incompatibilities of netcat. This also works sending to other hosts, ex: echo -n “hello” >/dev/udp/remotehost/8000 These are not “real” devices on the file system, but bash “special” aliases. There is additional information in the Bash … Read more
Try this: while true ; do nc -l -p 1500 -c ‘echo -e “HTTP/1.1 200 OK\n\n $(date)”‘; done The -cmakes netcat execute the given command in a shell, so you can use echo. If you don’t need echo, use -e. For further information on this, try man nc. Note, that when using echo there is … Read more