I’m trying to follow the apt instructions from here: https://www.sublimetext.com/docs/linux_repositories.html
But I keep hitting this when running sudo apt-get update
et:6 https://download.sublimetext.com apt/dev/ InRelease [2,533 B]
Err:6 https://download.sublimetext.com apt/dev/ InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F57D4F59BD3DF454
Reading package lists... Done
^[[AW: GPG error: https://download.sublimetext.com apt/dev/ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F57D4F59BD3DF454
E: The repository 'https://download.sublimetext.com apt/dev/ InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.