docs: use-dedibackup-ftp-backup: Adding Linux example

[QuentinCG]

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Description

Adding example for Linux in https://www.scaleway.com/en/docs/dedibox/dedicated-servers/how-to/use-dedibackup-ftp-backup/ to help user understand how to use the FTP backup server.

Indeed, this FTP server is a bit 'limited' as some basic commands like curl is not working properly with it.
It is therefor quite useful to have a working example (even if basic).

[bene2k1]

Hello @QuentinCG,

Thank you for submitting your PR!
Our engineering team has reviewed it, and we’ve provided some feedback and suggestions to help improve the Dedibackup documentation.

Feel free to apply these changes as you see fit, and don’t hesitate to reach out if you have any questions or would like to discuss any of the points further.

Benedikt

[QuentinCG]

Hello @bene2k1
Thanks for the review suggestion.

I agreed on all of them (better English explanation & more suitable example and limitation explanation).

[bene2k1]

Hello @QuentinCG,

Thank you for applying the suggestions.
Your PR has been reviewed by the documentation team and accepted to be merged.

The updated documentation will be published very soon.

Benedikt