All three of those links are very outdated - I do not recommend trying to use any of them.

Can you be more specific about what you are trying to do exactly? I know rclone is confusing to get started on, in part because it does so many different things and the documentation requires some background/outside knowledge.

Yeah, I know, “RTFM.”

Sorry, I didn’t mean to come across in a condescending way, if that’s how it read. I’ve only ever used rclone for Google Drive, and its been quite a while since I’ve personally set it up, as I no longer daily-drive linux (outside of WSL).

A “remote” presumably means a remote folder/share/whatever in the cloud, in this case on Proton Drive, yes?

Yes, following the documentation, you would run rclone config, then answer as follows:

• Create/Edit/Quit: n
• Name: proton
• Storage: protondrive
• User: username@protonmail.com
• Password: y to enter your password; then enter your password twice as prompted
• 2FA: If you have 2FA configured, enter the 6-digit OTP; else press <Enter> to skip
• Keep this “proton” remote?: y

This should create a proton-drive remote called “proton”, which you can reference in further rclone commands. For example:

# Check if out of sync
rclone check 'proton:' ~/proton 2>&1 | grep --quiet ' ERROR :'

# Sync local/remote
rclone sync 'proton:' ~/proton

If I want to set Rclone to automaticlly sync, say, my home folder to Proton Drive, Rclone has to run as a service on startup for this to work.

In the past, I wrote a script to handle the check/sync job, and scheduled it to run with crontab, as it was easier for me to work with. Here’s an example of the script to run rclone using the proton: remote defined above:

#!/usr/bin/env bash

# Ensure connected to the internet
ping -c 1 8.8.8.8 |& grep --quiet --ignore-case "unreachable" && exit 0

# If in-sync, skip sync procedure
rclone check 'proton:' "${HOME}" |& grep --quiet ' ERROR :' || exit 0

# Run sync operation
rclone --quiet sync 'proton:' "${HOME}"

If scheduling with crontab, running crontab -e will open your user’s schedule in the $VISUAL, $EDITOR or /usr/bin/editor text editor. Here, you could enter something like

0,30 * * * * /home/your_user_name/proton_sync.sh

Which would try to sync once every 30 minutes (crontab-guru).

you can use systemd to set up rclone as a system or user service

This is also an option, assuming your system is using systemd; which most distributions have moved to – you typically have to go out of your way to avoid it. I also don’t have much experience in writing my own service/timer files; but it looks like systemd-run may have you covered as well (source):

# Run every 30 minutes
systemd-run --user --on-calendar '*:0/30' /home/your_user_name/proton-sync.sh

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While I know writing config files and working with the terminal can be intimidating (it was for me in the beginning, anyway); I’d really recommend against running random ‘scripts’ you find online unless you either 100% trust the source, or can read/understand what they are doing. I have personally been caught-out recently from a trusted source doing jank shit in their scripts, which I didn’t notice until reading through them…and Linux Admin/DevOps is my day job…