cURL

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cURL (1996) [1] is a command-line tool for getting or sending data including files using URL syntax. cURL supports a range of common network protocols, currently including HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, LDAP, DAP, DICT, TELNET, FILE, IMAP, POP3, SMTP and RTSP.

brew install curl
apt install curl

Examples

-s --silent Avoid showing progress bar
-S --show-error
-L, --location follow redirects
curl --user user:pass --cookie-jar ./somefile_with_your_cookies https://xyz.com/a
curl --cookie ./omefile_with_your_cookiese https://xyz.com/b
  • Upload a file:
curl -u YOUR_USERNAME:YOUR_PASSWORD -T FILE_TO_UPLOAD https://yourpasswordprotectedpage.com/your_destionation
-T, --upload-file <file>
curl -sD - -o /dev/null http://example.com[3]
-s Avoid showing progress bar
-D Dump headers to a file, but - sends it to stdout
-o /dev/null Ignore response body


Offers the same features to fetch remote banner information from HTTP servers:

curl -s -I 192.168.0.15 | grep -e "Server: "

Other options:

-k, --insecure To accept self signed certificate
-L, --location

Advance usage

curl -o /dev/null -s -w 'Total: %{time_total}s\n' https://www.google.com

Errors

Related terms

See also

  • http://man7.org/linux/man-pages/man1/curl.1.html
  • https://docs.gitlab.com/ee/api/notification_settings.html#global-notification-settings
  • https://stackoverflow.com/questions/3252851/how-to-display-request-headers-with-command-line-curl
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