On 3/23/21 4:22 AM, Luís via GNU coreutils Bug Reports wrote:
In a reinstallation of Linux Mint 20 ( based on the ubuntu 20 focal fossa ), I found that the cat command, supported by the Coreutils package (8.30-ubuntu2) is no longer working.
Please send a bug report to the Linux Mint maintainers, as this evidently has nothing to do with the upstream Coreutils project.