parse json with shell scripting at linux [duplicate]

Answer 1

You can use a programming language with a json module, or if you desire a shell+*nix tool solution, you can use awk

$ awk -F"[,:]" '{for(i=1;i<=NF;i++){if($i~/uptime\042/){print $(i+1)} } }' file
 527

Answer 2

Version which uses ruby:

cat file | ruby -e "require 'rubygems'; require 'json'; puts JSON[STDIN.read]['serverStatus']['uptime'];"