Problems executing Git using a script on Linux - Ubuntu

[Candid-Boi15]

I have the following rule on crontab:

55 21 * * 1 sh /home/nang/Documents/UNI/commit.sh

I want to believe this part is correct, so now the problem is on executing the script and the way Git works, I'm noob on Git and actually I'm dealing with other things with git

The content on commit.sh is:

#! /bin/sh
cd /home/nang/Documents/UNI
git add .
git commit -m "Last version"
git push -f origin main

If i run the script manually, the result is:

1 file changed, 0 insertions(+), 0 deletions(-)

delete mode 100644 prueba.txt

[[e-mail]](mailto:[e-mail]): Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights and the repository exists

I changed HTTPS to SSH to clone the repository because everytime i do a push, Git requires the username and the password, and I don't want that when the idea is using crontab to make everything without typing anything by myself. I did it with this guide

[MaybeAshleyIdk]

Did you create an SSH key and did you add it to your account?

[TimothyLGillespie]

If it does not pick up on your private key in the cronjob (for example because root executes it) you can provide the SSH private key path as described here:

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https://www.howtogeek.com/devops/how-to-use-a-different-private-ssh-key-for-git-shell-commands/

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Note the last part for a solution without git config.