Clear Messages About The Process of Peer Creation

[Almansherov]

During the peer creation process there are not very clear messages telling user how to behave or what to expect and we have to pay special attention to the messages.

[ibragim13kz]

@dilshat @happyaron @liquuid We need to fix those errors. @jadilet @Almansherov FYI, guys.

[ibragim13kz]

[ibragim13kz]

And @jadilet will fix this one.

[ibragim13kz]

@efeefe Did you face some another error messages during peer creation or I mentioned all of them?

[happyaron]

About thisWARNING: apt does not have a stable CLI interface. Use with caution in scripts.

According to apt's man page:

The apt(8) commandline is designed as an end-user tool and it may change behavior between versions. While it tries not to break backward compatibility this is not guaranteed either if a change seems beneficial for interactive use.

All features of apt(8) are available in dedicated APT tools like apt-get(8) and apt-cache(8) as well.  apt(8) just changes the default value of some options (see apt.conf(5) and specifically the Binary scope). So you should prefer using these commands (potentially with some additional options enabled) in your scripts as they keep backward compatibility as much as possible.

So we should replace the usage of apt to apt-get and apt-cache where applicable.

[happyaron]

This PR (subutai-io/packer#74) is going to solve all the warnings except the rng-tools.service thing.

[efeefe]

I've seen only those @ibragim13kz

[ibragim13kz]

@jadilet Didn't you fix that?

[happyaron]

@ibragim13kz This wasn't mentioned and it's not saying anything scary, is it considered as an error message as well?

[ibragim13kz]

@happyaron It was not mentioned because this message appeared in consequence of @jadilet changes.

[Almansherov]

@happyaron are the last two messages fixed? it is enough to change their colors. When user faces the red messages, she/he starts worrying.