所以我有一个bash脚本，可以在服务器上输出详细信息。问题是我需要输出是JSON。最好的方法是什么？这是bash脚本：

# Get hostname
hostname=`hostname -A` 2> /dev/null

# Get distro
distro=`python -c 'import platform ; print platform.linux_distribution()[0] + " " +        platform.linux_distribution()[1]'` 2> /dev/null

# Get uptime
if [ -f "/proc/uptime" ]; then
uptime=`cat /proc/uptime`
uptime=${uptime%%.*}
seconds=$(( uptime%60 ))
minutes=$(( uptime/60%60 ))
hours=$(( uptime/60/60%24 ))
days=$(( uptime/60/60/24 ))
uptime="$days days, $hours hours, $minutes minutes, $seconds seconds"
else
uptime=""
fi

echo $hostname
echo $distro
echo $uptime

所以我想要的输出是这样的：

{"hostname":"server.domain.com", "distro":"CentOS 6.3", "uptime":"5 days, 22 hours, 1 minutes, 41 seconds"}

谢谢。