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I want to download https://example.com using the wget command, but it says “unsupported/unrecognized protocol”. I tried using the --secure protocol='' but that does not work.
I downloaded the tar file from GNU wget and tried configuring that but I failed.

Here is an example of what I see:

bash-2.05$ wget https://www.facebook.com/

https://www.facebook.com/: Unknown/unsupported protocol.

bash-2.05$

Hi folks thanks for the answers, the verified the version of my wget it says as below

bash-2.05$ wget -V

GNU Wget 1.6



Copyright (C) 1995, 1996, 1997, 1998, 2000 Free Software Foundation, Inc.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.



Originally written by Hrvoje Niksic <hniksic@arsdigita.com>.

and I have no idea if my wget is compiled by SSL and the SSL is enabled or not.
Could you please let me know how to compile the wget command. I tried running the configure file and then typed make command, that gives me command not found error. Even after running the configuration file it does not give me any wget file created in /usr/local/.

bash-2.05$ cd wget-1.10.1

bash-2.05$ ./configure --prefix=/usr/local --with-ssl

bash-2.05$ make

bash: make: command not found

the version I downloaded is
wget-1.10.1.tar

Solution

Verify your wget binary is compiled with SSL support enabled. My output when I try the command you gave:

$ wget https://www.facebook.com

--2015-07-19 15:27:17--  https://www.facebook.com/

Resolving www.facebook.com (www.facebook.com)... 31.13.66.1, 2a03:2880:f013:1:face:b00c:0:1

Connecting to www.facebook.com (www.facebook.com)|31.13.66.1|:443... connected.

HTTP request sent, awaiting response... 302 Found

Location: https://www.facebook.com/unsupportedbrowser [following]

--2015-07-19 15:27:18--  https://www.facebook.com/unsupportedbrowser

Reusing existing connection to www.facebook.com:443.

HTTP request sent, awaiting response... 200 OK

Length: unspecified [text/html]

Saving to: ‘index.html’



index.html                                                              [ <=>                                                                                                                                                                 ]  29.21K  --.-KB/s   in 0.04s  



2015-07-19 15:27:18 (775 KB/s) - ‘index.html’ saved [29916]



$

Given no fully Qualified URL downloads the default page index.html which contains tags etc. All this page will tell me when viewed via a browser is that my browser is not supported, in other words: We don't support fetching of pages via wget.

$ eix wget



[I] net-misc/wget

     Available versions:  1.16 ~1.16.1 ~1.16.2 ~1.16.3 {debug gnutls idn ipv6 nls ntlm pcre +ssl static test uuid zlib}

     Installed versions:  1.16(11:25:57 AM 07/19/2015)(idn ipv6 nls pcre ssl zlib -debug -gnutls -ntlm -static -test -uuid)

     Homepage:            http://www.gnu.org/software/wget/

     Description:         Network utility to retrieve files from the WWW

Per Comment

Here's what a version output looks like, in case you've never seen Gentoo based output (Notice -DHAVE_LIBSSL):

$ wget -V

wget -V

GNU Wget 1.16 built on linux-gnu.



+digest +https +ipv6 +iri +large-file +nls -ntlm +opie -psl +ssl/openssl 



Wgetrc: 

    /etc/wgetrc (system)

Locale: 

    /usr/share/locale 

Compile: 

    x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H 

    -DSYSTEM_WGETRC="/etc/wgetrc" -DLOCALEDIR="/usr/share/locale" -I. 

    -I../lib -I../lib -DHAVE_LIBSSL -march=amdfam10 -O2 -pipe 

Link: 

    x86_64-pc-linux-gnu-gcc -DHAVE_LIBSSL -march=amdfam10 -O2 -pipe 

    -Wl,-O1 -Wl,--as-needed -lpcre -lssl -lcrypto -lz -lidn ftp-opie.o 

    openssl.o ../lib/libgnu.a 



Copyright (C) 2014 Free Software Foundation, Inc.

License GPLv3+: GNU GPL version 3 or later

<http://www.gnu.org/licenses/gpl.html>.

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law.



Originally written by Hrvoje Niksic <hniksic@xemacs.org>.

Please send bug reports and questions to <bug-wget@gnu.org>.

Notice that ssl does not contain a minus in the Installed Versions line from the Gentoo based output, meaning I have compiled SSL support on my Gentoo box. In order to go further, would you please update your question with your distribution.

Try removing the "s"... I mean just use http.

Most of the times there is a redirection from http to https active and wget seems to work with it.

Hit the address in your browser with plain http and if you get redirected to https your wget will probably work.

So.. wget http://example.com/file