sflow to pcap file


1. install sflowtool
2. use tcpdump to write pcap file

 sflowtool -4 -p 6343 -t | tcpdump -r - -G 300 -w 'admin_%d-%m_%Y_%H_%M.pcap'

20191206

Steps to use cacti automation

1. create devices rules，graph rules
2.  create network discovery rules
3. discovery devices，add devices
2. apply graph rule to added device

20190511

Calibration of Atom 3D printer 1.0

1.
M503 get current step per mm
current data is X80 Y80 Z80

2. print 2.0 mm cube
3. real dimension is 1.98 1.98 2.03 cm
4. 2/1.98*80 = 80.81 2/2.03*80=78.82
5. M92 X80.81 Y80.81 Z78.82