Wget command is a commonly used CLI to download files from the internet. Curl is another command used to transfer data to or from a server. The Linux wget command-line tool is a nifty utility used to download files over the internet. Over time, curl was further improved with the addition of new internet protocols and features. In this guide, check out how to use curl to download a file. Today, you will find curl pre-installed in most of the Linux distros.
Curl is quite a popular package and is available for any Linux distro. However, there is no guarantee that curl is currently installed in your distro. Curl is open-source software. You can grab the curl source code and compile it manually. The following process was demonstrated in Ubuntu. For an in-depth guide on compiling curl, check out the official curl documentation.
Download the curl source code here. This limit is patched in version 9. Unfortunately, most systems currently run 9. Details can be found here. It has no concept of quoting or an escape character such as backslash. My goal was to create something that could be relied upon on random servers without needing to install anything or copy over a special utility.
It definitely has limitations due to that. Name required. Mail will not be published required. Notify me of followup comments via e-mail. It is unsurpassed as a command-line download manager. Yes, it can retrieve files, but it cannot recursively navigate a website looking for content to retrieve.
What curl actually does is let you interact with remote systems by making requests to those systems, and retrieving and displaying their responses to you. And arguably, due to its superior handling of Linux pipes, curl can be more easily integrated with other commands and scripts.
The author of curl has a webpage that describes the differences he sees between curl and wget. Out of the computers used to research this article, Fedora 31 and Manjaro On Ubuntu, run this command to install it:. The --version option makes curl report its version. 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.
Because each flat file may be different we may not be able to automate this massaging. But if your input files are consistently faulty you may not be able to automate the whole process. A neat feature of Linux is to be able to recall your command history. Just type history to see all the commands. To automatically push all your history to a file and edit the file to build your automated command.
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