Web site traffic - the download is interrupted, resume the downloadwith this
the download is interrupted, resume the downloadwith this command: $ wget -c ftp://www.sitename.com/filenameThe -coption instructs wgetto resume the down- load where it left off. Downloading and unpacking in one quick stepYou can redirect the output of a wgetdownload to atarcommand to download and unpack in one easystep: $ wget -O - http://tarball| tar -zxvf - The -Ooption redirects the output to the tarcom- mand. tarthen unpacks it to a subdirectory in yourcurrent directory. wget s optional flagsDozens of flags work with wget we ve noted a fewin Table 14-1. For a complete list, type man wgetatthe command line. TABLE14-1: HANDYWGETOPTIONSOptionWhat It Does-bGoes to background after starting. -qTurns off the output of wget. -vDisplays long debugging messages. -nvDisplays errors or basic info only. -tcountTries counttimes before giving up. -ncDoesn t overwrite files. One other option worthy of mention is –limit-rate=bandwidth. Use this flag to limitthedownload speed so you don t steal all thebandwidth away from other users on your system. $ wget –limit-rate=20k out the -koption, the documents that you downloadwill still point back to the original Web site. If you find yourself setting up a site mirror, either forinternal use or for the world, you ll want to keep itup-to-date. Schedule a job (with Task Scheduler) torun every night: $ wget -r –mirror -khttp://www.website.comThe –mirroroption checks your copy of the siteagainst the version published on the Web, and down- loads only those files that have changed. Verifying your bookmarks with wgetIf you re anything like us, your bookmark collectionis, well, a mess. Bookmarks accumulate over timeand pages that you may have been interested in afew months (or years) ago might not be there anymore. It s a good idea to weed out obsolete links nowand then just to keep your bookmark collectionunder control. Use wgetto check all the links onyour bookmarks or links page, with one easy com- mand. To make wgetimpersonate a spider and inves- tigate links, use this command: $ wget –spider –force-html -i bookmarks.htmlwgetvisits each link, and reports successful orunsuccessful connections for each entry in yourbookmarks page. Forget where you left your bookmarks? Usethe command locate -i bookmarkto generate a list of all the files with the wordbookmarkin their name. Downloading files with wgetTo use wgetto download a file from an FTP server, enter the following command: $ wget ftp://www.sitename.com/filename18_
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