When asked to use HTTP/3, curl issues a separate attempt to use older HTTP versions with a slight delay, so if the HTTP/3 transfer fails or is slow, curl still tries to proceed with an older HTTP version.

Dec 20, 2025 · The curl command in Linux is a command-line tool used to transfer data between a system and a server using different network protocols. It is widely used for fetching web content, …

curl assumes you want FTP. You can specify any amount of URLs on the command line. They are fetched in a sequential manner in the specified order unless you use -Z, --parallel.

When telling curl to do something, you invoke curl with zero, one or several command-line options to accompany the URL or set of URLs you want the transfer to be about. curl supports over two …

curl is a command-line tool for transferring data from or to a server using URLs. It supports these protocols: DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, …

Dec 3, 2024 · Curl is a powerful command line tool that lets you make HTTP requests from the terminal. Whether you need to inspect an API, download files, automate web scraping, work with remote …

Feb 22, 2025 · The curl command-line tool is one of the most useful and versatile programs you can learn. Its versatility and comprehensive HTTP implementation mean that, if there’s a URL for it, curl …

Single page documents with the most important curl options explained Download Download View curl-cheat-sheet on GitHub

This is a detailed and totally free book, available online (and as a PDF as a link from there) that explains everything there is to know about curl, libcurl and the associated project.

Typically, curl automatically extracts the public key from the private key file, but in cases where curl does not have the proper library support, a matching public key file must be specified using the --pubkey …