Who listens on my port 8080? With LSOF(8) I can get a first snippet of information:
$ lsof -i :8080
java 37007 fluffi 151u IPv6 0x4f6e02bfe6535ba5 0t0 TCP *:http-alt (LISTEN)
It's the java process with id 37007. Let's try to get some more information about this process:
$ ps u -p 1754
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
jenkins 1754 0.1 7.7 3364384 623828 ? Sl Oct13 129:22 ...
Seems to be our Jenkins CI server...ok.