-o <file> # --output: write to file
-u user:pass # --user: Authentication
-v # --verbose
-vv # Even more verbose
-s # --silent
-i # --include: Include the HTTP-header in the output
-I # --head: headers only
-d 'data' # --data: HTTP post data, URL encoded (eg, status="Hello")
-d @file # --data via file
-G # --get: send -d data via get
# Post data:
curl -d password=x http://x.com/y
# Auth/data:
curl -u user:pass -d status="Hello" http://twitter.com/statuses/update.xml
# multipart file upload
curl -v -include --form key1=value1 --form upload=@localfilename URL
# Use Curl to Check if a remote resource is available
# details: https://matthewsetter.com/check-if-file-is-available-with-curl/
curl -o /dev/null --silent -Iw "%{http_code}" https://example.com/my.remote.tarball.gz