DevOps

Useful commands

Quick way to check Service status
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prompt$ echo ruok | nc <hostname> <port>


** Example on a linux machine(for windows install http://sourceforge.net/projects/nmap-ncat/)

prompt$ echo ruok | nc localhost 8080


should return to prompt successfully. If the service is not up it will return connection refused.

*** Read more on nc a.k.a. ncat utility ***
ncat - Concatenate and redirect sockets

Count number of files in a directory
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$ls -l <dir> | wc -l