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It also lists all the protocols that it supports. If the file it is retrieving is a binary file, the outcome can be unpredictable. The shell may try to interpret some of the byte values in the binary file as control characters or escape sequences. Because there is no terminal window output to display, curl outputs a set of progress information. In this example, curl detects that the output is being redirected to a file and that it is safe to generate the progress information.
Double-clicking that file will open your default browser so that it displays the retrieved web page. Note that the address in the browser address bar is a local file on this computer, not a remote website.
We can create a file by using the -o output option, and telling curl to create the file. To have the text-based download information replaced by a simple progress bar, use the - progress bar option. It is easy to restart a download that has been terminated or interrupted. To restart the download, use the -C continue at option. This causes curl to restart the download at a specified point or offset within the target file.
If you use a hyphen - as the offset, curl will look at the already downloaded portion of the file and determine the correct offset to use for itself. Using xargs we can download multiple URLs at once. Perhaps we want to download a series of web pages that make up a single article or tutorial.
This is the command we need to use to have xargs pass these URLs to curl one at a time:. The -n 1 option tells xargs to treat each line of the text file as a single parameter. Checking in the file browser shows the multiple files have been downloaded. Each one bears the name it had on the remote server. Using curl with a File Transfer Protocol FTP server is easy, even if you have to authenticate with a username and password.
This is a free-for-testing FTP server hosted by Rebex. Use the same command as a moment ago, with the filename appended to it:. This can easily be done by the following command:. Once again, we can show this using an example. We will be downloading two HTML files from two different websites.
For better understanding, please look at the image below:. Here filename refers to the name that you want to address the file as. Using this, we can also change the type of the file. This is shown in the image below:. Wget also allows users to recursively download their files which is basically downloading all the files from the website under a single directory. For more information regarding Wget, users can input the following command into the terminal to get access to all the Wget commands that appear to be available:.
Curl is another command line tool that can be used to download files from the internet. In the above example, we have downloaded one picture file from the internet! The file will be saved in your present working directory by default.
In this example, we used wget to download file from the FTP server. It used anonymous login to get into the server and download the file! There are several options which you can use according to your requirement. The listing below a few important ones.
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