linux - How to upload one file by FTP from command line?

I need to upload a single file to FTP server from Ubuntu. This operation should be done in a script (in non-interactive mode). What is the right syntax for ftp?

I'm trying this, to no avail:

$ ftp -u ftp://user:secret@ftp.example.com my-local-file.txt
ftp: Invalid URL `ftp://'

Answer

Here is one approach:

$ ftp -n <open ftp.example.com
user user secret
put my-local-file.txt
EOF

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Alternatively, create (or edit) the ~/.netrc file in the home dir of the user that will run the ftp command, give it appropriate perms (chmod 0600 ~/.netrc), and add the following:

# ~/.netrc
machine ftp.example.com
login user
password secret

Then omit the login information, as in:

$ echo put my-local-file.txt | ftp ftp.example.com

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Also, here's how you might do the same thing using curl:

$ curl -T my-local-file.txt ftp://ftp.example.com --user user:secret