The directory prefix is the directory where all other files and sub-directories will be saved to, i. The default is. RichieHindle RichieHindle k 45 45 gold badges silver badges bronze badges. The manual's description makes this option hard to search for. I don't think of the location where I want to save something as a 'directory prefix'. Thanks for sharing! Also, you can remove the root folder via --no-host-directories or -nH as per serverfault.
Well, -P option isn't working to me on Is there some other detail I need to pay attention? Show 5 more comments. Asclepius RPradeep RPradeep 5, 1 1 gold badge 11 11 silver badges 11 11 bronze badges. Up voted for also specifying -O which I did not need, but made me feel more confident that -P was what I needed. Stewart There is no double slash error. NB: -O overrides -P , so you can't specify just output directory think dirname and just output filename think basename.
This kind of transformation works reliably for arbitrary combinations of directories. Because of this, local browsing works reliably: if a linked file was downloaded, the link will refer to its local name; if it was not downloaded, the link will refer to its full Internet address rather than presenting a broken link.
The fact that the former links are converted to relative links ensures that you can move the downloaded hierarchy to another directory. Note that only at the end of the download can Wget know which links have been downloaded. This filename part is sometimes referred to as the "basename", although we avoid that term here in order not to cause confusion.
It proves useful to populate Internet caches with files downloaded from different hosts. Note that only the filename part has been modified. Turn on options suitable for mirroring. This option turns on recursion and time-stamping, sets infinite recursion depth and keeps FTP directory listings.
This option causes Wget to download all the files that are necessary to properly display a given HTML page. This includes such things as inlined images, sounds, and referenced stylesheets. Ordinarily, when downloading a single HTML page, any requisite documents that may be needed to display it properly are not downloaded. For instance, say document 1. Say that 2. Say this continues up to some arbitrarily high number. As you can see, 3. However, with this command:.
One might think that:. Links from that page to external documents will not be followed. Turn on strict parsing of HTML comments. Until version 1. Beginning with version 1. Specify comma-separated lists of file name suffixes or patterns to accept or reject see Types of Files.
Specify the regular expression type. Set domains to be followed. Specify the domains that are not to be followed see Spanning Hosts. Without this option, Wget will ignore all the FTP links. If a user wants only a subset of those tags to be considered, however, he or she should be specify such tags in a comma-separated list with this option.
To skip certain HTML tags when recursively looking for documents to download, specify them in a comma-separated list. In the past, this option was the best bet for downloading a single page and its requisites, using a command-line like:. Ignore case when matching files and directories. The quotes in the example are to prevent the shell from expanding the pattern. Enable spanning across hosts when doing recursive retrieving see Spanning Hosts.
Follow relative links only. Useful for retrieving a specific home page without any distractions, not even those from the same hosts see Relative Links. Specify a comma-separated list of directories you wish to follow when downloading see Directory-Based Limits. Elements of list may contain wildcards. Specify a comma-separated list of directories you wish to exclude from download see Directory-Based Limits.
Do not ever ascend to the parent directory when retrieving recursively. This is a useful option, since it guarantees that only the files below a certain hierarchy will be downloaded.
See Directory-Based Limits , for more details. With the exceptions of 0 and 1, the lower-numbered exit codes take precedence over higher-numbered ones, when multiple types of errors are encountered.
Recursive downloads would virtually always return 0 success , regardless of any issues encountered, and non-recursive fetches only returned the status corresponding to the most recently-attempted download. We refer to this as to recursive retrieval , or recursion. This means that Wget first downloads the requested document, then the documents linked from that document, then the documents linked by them, and so on. In other words, Wget first downloads the documents at depth 1, then those at depth 2, and so on until the specified maximum depth.
The default maximum depth is five layers. When retrieving an FTP URL recursively, Wget will retrieve all the data from the given directory tree including the subdirectories up to the specified depth on the remote server, creating its mirror image locally.
FTP retrieval is also limited by the depth parameter. By default, Wget will create a local directory tree, corresponding to the one found on the remote server. Recursive retrieving can find a number of applications, the most important of which is mirroring. It is also useful for WWW presentations, and any other opportunities where slow network connections should be bypassed by storing the files locally.
You should be warned that recursive downloads can overload the remote servers. Because of that, many administrators frown upon them and may ban access from your site if they detect very fast downloads of big amounts of content. The download will take a while longer, but the server administrator will not be alarmed by your rudeness.
Of course, recursive download may cause problems on your machine. If left to run unchecked, it can easily fill up the disk. If downloading from local network, it can also take bandwidth on the system, as well as consume memory and CPU. Try to specify the criteria that match the kind of download you are trying to achieve. See Following Links , for more information about this. When retrieving recursively, one does not wish to retrieve loads of unnecessary data.
Most of the time the users bear in mind exactly what they want to download, and want Wget to follow only specific links. This is a reasonable default; without it, every retrieval would have the potential to turn your Wget into a small version of google. However, visiting different hosts, or host spanning, is sometimes a useful option. Maybe the images are served from a different server. Maybe the server has two equivalent names, and the HTML pages refer to both interchangeably.
Unless sufficient recursion-limiting criteria are applied depth, these foreign hosts will typically link to yet more hosts, and so on until Wget ends up sucking up much more data than you have intended. You can specify more than one address by separating them with a comma, e. When downloading material from the web, you will often want to restrict the retrieval to only certain file types.
For example, if you are interested in downloading GIF s, you will not be overjoyed to get loads of PostScript documents, and vice versa. Wget offers two options to deal with this problem. Each option description lists a short name, a long name, and the equivalent command in. A matching pattern contains shell-like wildcards, e. Look up the manual of your shell for a description of how pattern matching works.
So, if you want to download a whole page except for the cumbersome MPEG s and. The quotes are to prevent expansion by the shell. This behavior may not be desirable for all users, and may be changed for future versions of Wget. It is expected that a future version of Wget will provide an option to allow matching against query strings.
This behavior, too, is considered less-than-desirable, and may change in a future version of Wget. Regardless of other link-following facilities, it is often useful to place the restriction of what files to retrieve based on the directories those files are placed in. There can be many reasons for this—the home pages may be organized in a reasonable directory structure; or some directories may contain useless information, e.
Wget offers three different options to deal with this requirement. Any other directories will simply be ignored. The directories are absolute paths.
The simplest, and often very useful way of limiting directories is disallowing retrieval of the links that refer to the hierarchy above than the beginning directory, i. Using it guarantees that you will never leave the existing hierarchy.
Supposing you issue Wget with:. Only the archive you are interested in will be downloaded. Relative links are here defined those that do not refer to the web server root.
For example, these links are relative:. The rules for FTP are somewhat specific, as it is necessary for them to be. FTP links in HTML documents are often included for purposes of reference, and it is often inconvenient to download them by default. Also note that followed links to FTP directories will not be retrieved recursively further. One of the most important aspects of mirroring information from the Internet is updating your archives.
Downloading the whole archive again and again, just to replace a few changed files is expensive, both in terms of wasted bandwidth and money, and the time to do the update.
This is why all the mirroring tools offer the option of incremental updating. Such an updating mechanism means that the remote server is scanned in search of new files. Only those new files will be downloaded in the place of the old ones. To implement this, the program needs to be aware of the time of last modification of both local and remote files.
We call this information the time-stamp of a file. With this option, for each file it intends to download, Wget will check whether a local file of the same name exists. If it does, and the remote file is not newer, Wget will not download it. If the local file does not exist, or the sizes of the files do not match, Wget will download the remote file no matter what the time-stamps say.
The usage of time-stamping is simple. Say you would like to download a file so that it keeps its date of modification. A simple ls -l shows that the time stamp on the local file equals the state of the Last-Modified header, as returned by the server.
Several days later, you would like Wget to check if the remote file has changed, and download it if it has. Wget will ask the server for the last-modified date. If the local file has the same timestamp as the server, or a newer one, the remote file will not be re-fetched. However, if the remote file is more recent, Wget will proceed to fetch it. After download, a local directory listing will show that the timestamps match those on the remote server.
If you wished to mirror the GNU archive every week, you would use a command like the following, weekly:. Note that time-stamping will only work for files for which the server gives a timestamp. If you wish to retrieve the file foo. If the file does exist locally, Wget will first check its local time-stamp similar to the way ls -l checks it , and then send a HEAD request to the remote server, demanding the information on the remote file.
If the remote file is newer, it will be downloaded; if it is older, Wget will give up. It will try to analyze the listing, treating it like Unix ls -l output, extracting the time-stamps. The rest is exactly the same as for HTTP. Assumption that every directory listing is a Unix-style listing may sound extremely constraining, but in practice it is not, as many non-Unix FTP servers use the Unixoid listing format because most all? Bear in mind that RFC defines no standard way to get a file list, let alone the time-stamps.
We can only hope that a future standard will define this. Another non-standard solution includes the use of MDTM command that is supported by some FTP servers including the popular wu-ftpd , which returns the exact time of the specified file. Wget may support this command in the future. Once you know how to change default settings of Wget through command line arguments, you may wish to make some of those settings permanent.
You can do that in a convenient way by creating the Wget startup file—. You can find. Failing that, no further attempts will be made. Fascist admins, away! The variable will also be called command. Valid values are different for different commands. The commands are case-, underscore- and minus-insensitive.
Commands that expect a comma-separated list will clear the list on an empty command. So, if you wish to reset the rejection list specified in global wgetrc , you can do it with:. The complete set of commands is listed below. Some commands take pseudo-arbitrary values. Most of these commands have direct command-line equivalents. If this option is given, Wget will send Basic HTTP authentication information plaintext username and password for all requests. Use up to number backups for a file.
Set the certificate authority bundle file to file. Set the directory used for certificate authorities. Set the client certificate file name to file. If this is set to off, the server certificate is not checked against the specified client authorities. If set to on, force continuation of preexistent partially retrieved files. Ignore n remote directory components. With dot settings you can tailor the dot retrieval to suit your needs, or you can use the predefined styles see Download Options.
Specify the number of dots that will be printed in each line throughout the retrieval 50 by default. Use string as the EGD socket file name. Set your FTP password to string. Choose the compression type to be used. Turn the keep-alive feature on or off defaults to on.
Force connecting to IPv4 addresses, off by default. Available only if Wget was compiled with IPv6 support. Force connecting to IPv6 addresses, off by default. Limit the download speed to no more than rate bytes per second. Load cookies from file. Use string as the comma-separated list of domains to avoid in proxy loading, instead of the one specified in environment.
Set the private key file to file. Set the type of the progress indicator. Submit Next Question. By signing up, you agree to our Terms of Use and Privacy Policy. Forgot Password? This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy.
Linux wget By Priya Pedamkar. So the command will directly hit the URL and get the file. Examples of Linux wget Given below are the examples: Example 1 wget command It is the basic command of wget. We need to download it as per the below command. Using the wget command, we are able to download the wget file form the internet.
Notice the uppercase O. Full command line to use could be:. Putting -O last will not. Either curl or wget can be used in this case. You can prove the files downloaded by each of the 3 techniques above are exactly identical by comparing their sha hashes.
See also: How to capture cURL output to a file? Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 8 years, 6 months ago. Active 1 month ago. Viewed k times. For example: I am downloading a file from www. I am using the wget command as follows: wget www.
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