Hi,
I am started Dockers for Absolute beginners, Can you please tell me what does fsSL stands for in this command?
$ curl -fsSL https://get.docker.com -o get-docker.sh
I can understand the concept that we are calling it to download the file name get-docker.sh from that weblink via Curl command, but fsSL is confusing me
From #man curl, these are options you can use with the curl command:
-f, --fail
(HTTP) Fail silently (no output at all) on server errors. This is
mostly done to enable scripts etc to better deal with failed
attempts. In normal cases when an HTTP server fails to deliver a
document, it returns an HTML document stating so (which often also
describes why and more). This flag will prevent curl from
outputting that and return error 22.
This method is not fail-safe and there are occasions where non-
successful response codes will slip through, especially when
authentication is involved (response codes 401 and 407).
See also --fail-with-body.
-S, --show-error
When used with -s, --silent, it makes curl show an error message
if it fails.
See also --no-progress-meter.
-s, --silent
Silent or quiet mode. Don't show progress meter or error messages.
Makes Curl mute. It will still output the data you ask for,
potentially even to the terminal/stdout unless you redirect it.
Use -S, --show-error in addition to this option to disable
progress meter but still show error messages.
See also -v, --verbose, --stderr and --no-progress-meter.
-L, --location
(HTTP) If the server reports that the requested page has moved to
a different location (indicated with a Location: header and a 3XX
response code), this option will make curl redo the request on the
new place. If used together with -i, --include or -I, --head,
headers from all requested pages will be shown. When
authentication is used, curl only sends its credentials to the
initial host. If a redirect takes curl to a different host, it
won't be able to intercept the user+password. See also --location-
trusted on how to change this. You can limit the amount of
redirects to follow by using the --max-redirs option.
When curl follows a redirect and if the request is a POST, it will
do the following request with a GET if the HTTP response was 301,
302, or 303. If the response code was any other 3xx code, curl
will re-send the following request using the same unmodified
method.
You can tell curl to not change POST requests to GET after a 30x
response by using the dedicated options for that: --post301,
--post302 and --post303.
Thanks for asking the question, now I know what they do too!