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My vitual machine (drived by CentOS) IP is 192.168.1.114
It can be successfully connected using SecureCRT and FileZila.
I try to use Curl to implement file uploading and downloading,

curl --ftp-ssl

It doesn't work and there is no avaliable information on offical site.
Who can tell me how to do next?Much thanks!

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Quick diagnosis and the root cause: the command you tried used FTP/FTPS options, but SFTP is a different protocol (it runs over SSH, normally on port 22). Curl speaks SFTP only when used with the sftp:// URL scheme (and when the curl binary was built with an SSH backend such as libssh2). That means switching from ftp:// plus --ftp-ssl to sftp:// is necessary if the server is running SSH/SFTP. (jscape.com)

Concrete curl examples (replace username and paths as needed). Download a remote file (save with remote name):

curl -u username sftp://192.168.1.114/path/to/remote-file -O

Upload a local file (use remote directory; trailing slash appends local filename):

curl -T ./localfile -u username sftp://192.168.1.114/remote/dir/

Key-based auth (private key file):

curl --key ~/.ssh/id_rsa -u username sftp://192.168.1.114/remote/file

(The -T/upload behavior and the sftp examples are documented in the curl docs.) (ec.haxx.se)

Auth and path gotchas: curl will try public-key auth first if a key is available; use --key (and --pass if the key is passphrase-protected) or supply credentials. In some situations putting username:password in the URL forces password auth when -u alone does not; that workaround is documented in user reports. Also note sftp/scp URLs are treated as absolute paths on the server — use /~/ for paths relative to the account home. (curl.se)

Troubleshooting steps to try now (echoing ' good suggestion to get verbose output): 1) run curl --version and confirm sftp appears in the Protocols list; 2) try a simple download/upload above with -v to see which auth methods the server advertises; 3) if sftp is missing from your curl, install a package/build with libssh2 support or use the OpenSSH sftp client instead. If you paste -v output when asking for more help, redact passwords. (curl.se)

References: curl tutorial/manual (sftp usage) — https://curl.se/docs/tutorial.html. Curl uploads doc (-T) — https://ec.haxx.se/usingcurl/uploads.html. SFTP vs FTPS overview — https://www.jscape.com/blog/understanding-key-differences-between-ftp-ftps-and-sftp.

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Member Avatar for tiredoy

anybody?

Member Avatar for Gribouillis

I don't know much about it, but there are many links about this. This one for example looks good . It seems to me that you should at least try the -v option to get debugging information if it fails.

Edited by Gribouillis
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