===== curl =====


  * ''-O, --remote-name'': save the file with remote filename
  * ''-o, --no-remote-name'': save the file as the name provided
  * ''-L, --location'': follow 3xx redirect
  * ''-#, --progress-bar'': show download progress
  * ''-X, --request'': specify request method
  * ''-F, --form'': multipart post
  * ''-f, --fail'': Fail silently (no output at all) on server errors. This is mostly done to enable scripts etc to better deal with failed attempts.
  * ''-k, --insecure'': ignore SSL certificate

==== automatically find out where/how to resume the transfer ====
<code>curl -O -C -</code>

==== post body from pipe ====
<code>
cat file.json | curl --request POST https://httpbin.org/post --data-binary @-
</code>

==== post form data ====
<code>
curl --request POST https://httpbin.org/post -F X=1
</code>


==== upload a file ====
<code>
curl -X POST https://httpbin.org/post -F 'file=@filename.txt'
</code>