Curl command to download file with username and password

For that, we must use the -O option:. You'll notice that cURL will display a download progress table rather than the file contents this time:. If you'd like the file to have a different file name perhaps readme is too bossy for you , specify it after -O :.

That's all well and good, but downloading lots of files in this way would quickly become a hassle. You can download more than one file in a single command by using the following syntax:. If you have a long list of different files you want to download, you can place them in a text file and run cURL with xargs:.

As it's common for site admins to move the location of a file, then redirect to the new one, it can be good practice to include the -L option in your cURL command. You get no output. Use the same command as a moment ago, with the filename appended to it:. In almost all cases, it is going to be more convenient to have the retrieved file saved to disk for us, rather than displayed in the terminal window. Once more we can use the -O remote file output command to have the file saved to disk, with the same filename that it has on the remote server.

The file is retrieved and saved to disk. We can use ls to check the file details. It has the same name as the file on the FTP server, and it is the same length, bytes. Some remote servers will accept parameters in requests that are sent to them.

The parameters might be used to format the returned data, for example, or they may be used to select the exact data that the user wishes to retrieve. It is often possible to interact with web application programming interfaces APIs using curl. As a simple example, the ipify website has an API can be queried to ascertain your external IP address.

It returns a JSON object describing a book. You can find these on the back cover of most books, usually below a barcode. Especially if the protocol was one of the many not supported by wget.

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Best Bluetooth Headphones for Switch. Best Roku TV. Best Apple Watch. Best iPad Cases. Best Portable Monitors. Best Gaming Keyboards. Best Drones. Best 4K TVs. Best iPhone 13 Cases. Best Tech Gifts for Kids Aged Awesome PC Accessories. Like other answers, I would like to emphasize the need to be aware of the security of this issue. If you don't have any passwords or want to skip the command prompt to require a simple password, leave the password section blank.

The safest way to prompt for credentials to be passed to curl is to prompt for credentials to be inserted. But what if you can't pass your user name this way? For example, the user name may need to be part of the url, and only the password is part of the json payload. Why it is not safe to type a command directly on the command line, because your secret will eventually be seen by any other user running ps-aux because it lists the commands submitted for each currently running process.

It is also because your key subsequently appears in the bash history once the shell terminates. Why is it unsafe to include it in a local file? However, it is still a file on the file system and is not encrypted when static. This is much more demanding than OP, but since this is the best result of securely passing passwords to curl, I've added these solutions here for others who arrive here.

Note: -s arg for read command is not POSIX, so it is not available everywhere, so it will not be used below. We'll use stty-echo and stty echo instead. Note: perl is fairly common on all systems I've tried, because it's dependent on many things, whereas Ruby and python are not, so use perl here. Note: Tested in bash 3. Securely prompt the user to enter reusable passwords for curling.