An error occurred while using the wget command

With centos6.5, when I use my life today

sudo wget https://cmake.org/files/v3.6/cmake-3.6.1.tar.gz

This error occurred while downloading a cmake package

--2016-09-01 06:53:39--  https://cmake.org/files/v3.6/cmake-3.6.1.tar.gzResolving cmake.org ... 66.194.253.19Connecting to cmake.org|66.194.253.19|:443 ... Connected. Error:certificate common name "*.kitware.com" doesn ' t match requested host name "Cmake.org". To connect to cmake.org insecurely, use '--no-check-certificate '.

There is no test certificate, this should be the meaning of it. Maybe it's a certificate problem for my server.

Now look at Wget's help (wget option URL):

GNU Wget 1.12, a non-interactive network retriever. Usage:wget [OPTION] ... [URL] ... Mandatory arguments to long options is Mandatory for short options too.  Startup:-V,--version display the version of Wget and exit.  -H,--help print this help.  -B,--background go to background after startup. -E,--execute=command execute a '. Wgetrc '-style COMMAND.  Logging and input file:-O,--output-file=file log messages to file.  -A,--append-output=file append messages to FILE.  -D,--debug print lots of debugging information.  -Q,--quiet quiet (no output).  -V,--verbose be verbose (this is the default).  -NV,--no-verbose turn off verboseness, without being quiet.  -I,--input-file=file download URLs found in local or external file.  -F,--force-html treat input file as HTML. -b,--base=url resolves HTML input-file links (-i-f) relative to URL.       Download:-T,--tries=number set number of retries to number (0 unlimits).  --retry-connrefused Retry Even if connection is refused.  -O,--output-document=file write documents to FILE.  -NC,--no-clobber skip downloads that would download to existing files.       -C,--continue resume getting a partially-downloaded file.  --progress=type Select Progress Gauge TYPE.  -N,--timestamping don ' t re-retrieve files unless newer than local.       -S,--server-response print server response.  --spider don ' t download anything.       -T,--timeout=seconds set all timeout values to SECONDS.       --dns-timeout=secs Set the DNS lookup timeout to SECS.       --connect-timeout=secs Set the Connect timeout to SECS.  --read-timeout=secs set the Read timeout to SECS. -W,--wait=seconds wait SECONDS Between retrievals.       --waitretry=seconds wait 1..SECONDS between retries of a retrieval.       --random-wait wait from 0...2*wait secs between retrievals.  --no-proxy explicitly turn off proxy.       -Q,--quota=number set retrieval quota to number.       --bind-address=address bind to address (hostname or IP) on local host.       --limit-rate=rate limit download rate.       --no-dns-cache Disable caching DNS lookups.       --restrict-file-names=os restrict chars in file names to ones OS allows.  --ignore-case Ignore case when matching files/directories.  -4,--inet4-only connect only to IPV4 addresses.       -6,--inet6-only connect only to IPV6 addresses. --prefer-family=family Connect first to addresses of specified family, one of IPv6, IPv       4, or none.     --user=user set both FTP and HTTP user to user.  --password=pass set both FTP and HTTP password to PASS.       --ask-password Prompt for passwords.       --no-iri turn off IRI support.       --local-encoding=enc use ENC as the local encoding for IRIs. --remote-encoding=enc use ENC as the default remote encoding.  Directories:-nd,--no-directories don ' t create directories.  -X,--force-directories force creation of directories.       -NH,--no-host-directories don ' t create host directories.  --protocol-directories use protocol name in directories. -p,--directory-prefix=prefix save files to prefix/...--cut-dirs=number ignore number remote directory C Omponents.       HTTP options:--http-user=user set HTTP user to user.       --http-password=pass set HTTP password to PASS.       --no-cache Disallow server-cached data.                              --default-page=name Change the default page NAME (normally This is ' index.html '.       -E,--adjust-extension save HTML/CSS documents with proper extensions.       --ignore-length Ignore ' content-length ' header field.       --header=string Insert STRING among the headers.       --max-redirect maximum redirections allowed per page.       --proxy-user=user set user as proxy username.       --proxy-password=pass set PASS as proxy password.       --referer=url include ' Referer:url ' header in HTTP request.  --save-headers Save the HTTP headers to file.       -U,--user-agent=agent identify as agent instead of wget/version.       --no-http-keep-alive Disable HTTP keep-alive (persistent connections).       --no-cookies don ' t use cookies.       --load-cookies=file load cookie from FILE before session.       --save-cookies=file Save Cookie to FILE after session.       --keep-session-cookies Load and save session (Non-permanent) cookies.     --post-data=string Use the POST method;       Send STRING as the data. --post-file=file use the Post method;       Send contents of FILE. --content-disposition Honor the Content-disposition header when choosing local file names       (experimental).  --auth-no-challenge Send Basic HTTP authentication information without first waiting for The server ' s challenge.                                HTTPS (SSL/TLS) options:--SECURE-PROTOCOL=PR Choose Secure Protocol, one of auto, SSLv2,       SSLv3, and TLSv1. --no-check-certificate don ' t validate the server ' s certificate.       [Do not verify the server's certificate]--certificate=file client certificate FILE.       --certificate-type=type client certificate type, PEM or DER.       --private-key=file private key FILE.       --private-key-type=type private key type, PEM or DER.       --ca-certificate=file FILE with the bundle of Ca ' s. --ca-directory=dir      directory where hash list of CA ' s is stored.       --random-file=file file with random data for seeding the SSL PRNG. --egd-file=file file naming the EGD socket with random data.       FTP options:--ftp-user=user set FTP user to user.       --ftp-password=pass set FTP password to PASS.       --no-remove-listing don ' t remove '. Listing ' files.       --no-glob Turn off FTP file name globbing.       --NO-PASSIVE-FTP Disable the "passive" transfer mode. --retr-symlinks when recursing, get linked-to files (not dir).  Recursive Download:-R,--recursive specify Recursive download.       -L,--level=number maximum recursion depth (INF or 0 for infinite).  --delete-after Delete files locally after downloading them.  -K,--convert-links make links in downloaded HTML or CSS point to local files. -K,--backup-converted before converting file X, back up as X.orig.  -M,--mirror shortcut for-n-r-l inf--no-remove-listing.       -P,--page-requisites get all images, etc. needed to display HTML page. --strict-comments turn on Strict (SGML) handling of HTML comments.  Recursive accept/reject:-A,--accept=list comma-separated LIST of accepted extensions.  -R,--reject=list comma-separated LIST of rejected extensions.       -D,--domains=list comma-separated LIST of accepted domains.       --exclude-domains=list comma-separated LIST of rejected domains.       --follow-ftp follow FTP links from HTML documents.       --follow-tags=list comma-separated LIST of followed HTML tags.  --ignore-tags=list comma-separated LIST of ignored HTML tags.  -H,--span-hosts go to foreign the hosts when recursive.  -L,--relative follow relative links only.  -I,--include-directories=list LIST of allowed directories. -X,--exclude-Directories=list LIST of excluded directories. -NP,--no-parent don ' t ascend to the parent directory.

Then I can use it.

sudo wget--no-check-certificate https://cmake.org/files/v3.6/cmake-3.6.1.tar.gz

And then it's OK ... It's a simple operation.

An error occurred while using the wget command