Introduction : cURL is both a command line utility and library. One can use it to download or transfer of data/files using many different protocols such as HTTP, HTTPS, FTP, SFTP and more.
The curl command line utility lets you fetch a given URL or file from the bash shell. This page explains how to download files with curl command on a Linux, macOS, *BSD and Unix-like operating systems.
How to download a file with curl command
The basic syntax is:
curl url --output filename
curl https://url -o output.file.name
Let us try to download a file from https://www.cyberciti.biz/files/sticker/sticker_book.pdf and save it as output.pdf
curl https://www.cyberciti.biz/files/sticker/sticker_book.pdf -o output.pdf
curl https://www.cyberciti.biz/files/sticker/sticker_book.pdf --output output.pdf
The -o or --output option allows you to give the downloaded file a different name. If you do not provide the output file name curl will display it to the screen.
How to download a single file without giving output name
You can save output file as it is i.e. write output to a local file named like the remote file we get. For example, sticker_book.pdf is a file name for remote URL https://www.cyberciti.biz/files/sticker/sticker_book.pdf. One can save it sticker_book.pdf directly without specifying the -o or --output option by passing the -O (capital
curl -O https://www.cyberciti.biz/files/sticker/sticker_book.pdf
How to deal with HTTP 301 redirected file
The remote HTTP server might send a different location status code when downloading files. For example, HTTP URLs are often redirected to HTTPS URLs with HTTP/301 status code. Just pass the -L follow the 301 (3xx) redirects and get the final file on your system:
curl -L -O http://www.cyberciti.biz/files/sticker/sticker_book.pdf
How to download multiple files using curl
curl -O url1 -O url2
curl -O https://www.cyberciti.biz/files/adduser.txt \
One can use the bash for loop too:
## define a bash shell variable ## urls="https://www.cyberciti.biz/files/adduser.txt https://www.cyberciti.biz/files/test-lwp.pl.txt" ## let us grab it ## for u in $urls do curl -O "$u" done
How to download a password protected file with curl
Try any one of the following syntax
curl --ftp-ssl -u UserName:PassWord ftp://ftp1.cyberciti.biz:21/backups/07/07/2012/mysql.blog.sql.tar.gz
curl -u Username:Password https://server1.cyberciti.biz/file/path/data.tar.gz
How to download file using a proxy server
Again syntax is as follows:
curl -x proxy-server-ip:PORT -O url
curl -x 'http://vivek:YourPasswordHere@10.12.249.194:3128' -v -O https://dl.cyberciti.biz/pdfdownloads/b8bf71be9da19d3feeee27a0a6960cb3/569b7f08/cms/631.pdf
Like most Linux or Unix CLI utilities, you can learn much more about curl command by visiting this help page.