Debian LXC command not found

I am trying to do things with LXC and I have been able to manage with the lxc-* commands but now I have been forced to copy a file and I'm stuck because I can't get to copy the file, I have read that using lxc file I can do it. But at all times the message of command not found comes out.

I've tried googling, checking forums, trying weird stuff, etc. But none of this has worked.

I think I need to install lxc-client and or lxd, but I can't install it or even if I manage to install it, the copy command doesn't work for me. Here are some of the things I have tried:

apt install snapd
snap refresh
snap install snapd
snap install core

snap install lxd

apt-get install lxc-client
apt-get install lxd

I know there are hundreds of similar questions and almost all of them have an answer, but I can't understand what they did to make it work for them.

I also don't quite understand what difference lxc has to have to use two different types of commands, those with lxc-ls and those that use a space lxc file

The answer was simpler than I thought, I just had to restart the computer and the commands worked, looking for a little more information I found that snap refresh did the job of reloading them. Here is the list of commands that I have used:

apt install snapd -y
snap refresh
snap install core
snap install lxd
snap refresh

I still don't really understand the difference between these and the others. I have not discovered how the command lxc file works, which was my interest, but little by little and question by question