[root@AY140716161543837722Z ~]# wget -h

GNU Wget 1.12, a non-interactive network retriever.Usage: wget [OPTION]... [URL]...Mandatory arguments to long options are 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 to 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, IPv4, 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 components.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 cookies from FILE before session.       --save-cookies=FILE     save cookies 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.       --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 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.Mail bug reports and suggestions to <bug-wget@gnu.org>.[root@AY140716161543837722Z ~]#

wget 网址而要让档案自动储存到指令的目录下，则需要借用-P这个参数可以使用以下的指令wget -P 目录 网址举例来说，如果你要将某个网址的文件下载之后存放到/root底下，你可以打下列的指令：wget -P /root 网址

GNU Wget是一个在网络上进行下载的简单而强大的自由软件，其本身也是GNU计划的一部分。它的名字是“World Wide Web”和“Get”的结合，同时也隐含了软件的主要功能。目前它支持通过HTTP、HTTPS，以及FTP这三个最常见的TCP/IP协议协议下载

主要特点包括：

• 支持递归下载

• 恰当的转换页面中的链接

• 生成可在本地浏览的页面镜像

• 支持代理服务器

1996年，随着互联网的爆发，Wget出现了。并广泛的被Unix和主要的Linux发行版用户所使用。由于使用移植性非常良好的C语言，所以Wget可以轻松的在任何类似Unix的系统以及其他Unix变种操作系统上编译使用，如Mac OS X，Microsoft Windows[1]，和OpenVMS[2]。

由于没有交互式界面，在类Unix平台上Wget可在后台运行，截获并忽略HANGUP信号，因此在用户退出登录以后，仍可继续运行。通常，Wget用于成批量地下载Internet网站上的文件，或制作远程网站的镜像。

在其之上的图形界面应用程序有：下面的gwget。Windows系统下面的wGetGUI。