# crontab -e
* * * * * /opt/vc/bin/vcgencmd measure_temp | awk -F"=" '{print $2}' | awk -F"'" '{print "node_cpu_temperature " $1}' > /var/lib/node_exporter/textfile_collector/cpu_temp.prom.$$ && mv /var/lib/node_exporter/textfile_collector/cpu_temp.prom.$$ /var/lib/node_exporter/textfile_collector/cpu_temp.prom