I am trying to transmit data out of an embedded Linux device over the wifi connection. I have curl and wget on the device. How would I transmit data out of the device using curl or wget ? Any pointers welcome.
there is a "--post-file" option in wget:
wget --post-file=filetoSend URL
If it is only (key,value) pairs that you want to send then
curl -d key1=value1 -d key2=value2 <URL>
But if it is some file that you want to send then
curl --data-binary @<file path> <URL>
this is a get: curl "http://www.google.com/?hl=en&q=search"
for a post you have to use the option "-d" and specify the key=value variables
Try netcat, the swiss-army-knife for sending receiving data using the console ;). Some examples covering common use-cases can be found here: http://www.g-loaded.eu/2006/11/06/netcat-a-couple-of-useful-examples/
Sending a file:
On your embedded device start serving content on port 3333:
cat myfile.txt | nc -l 3333
On your PC start listening on port 3333 and dump data into a file:
nc <ip-of-embedded-device> 3333 > receivedData.txt
来源：https://stackoverflow.com/questions/6865146/how-to-send-data-using-curl-from-linux-command-line