SOLVED - Should Python 2.7 (Debian 9 distribution) been updated to 3.x right now?

Root-Server, 4.9.0-8-amd64 #1 SMP Debian 4.9.130-2 (2018-10-27) x86_64; 8GB RAM; 320GB HDD1, 2 CPU's

Code:

##### SERVER #####
IP-address (as per hostname): ***.***.***.***
[WARN] could not determine server's ip address by ifconfig
[INFO] No ISPConfig found.

##### VERSION CHECK #####

[INFO] php (cli) version is 7.0.33-0+deb9u1

##### PORT CHECK #####

[WARN] Port 993 (IMAP server SSL) seems NOT to be listening
[WARN] Port 995 (POP3 server SSL) seems NOT to be listening
[WARN] Port 21 (FTP server) seems NOT to be listening

##### MAIL SERVER CHECK #####


##### RUNNING SERVER PROCESSES #####

[INFO] I found the following web server(s):
    Apache 2 (PID 1337)
[INFO] I found the following mail server(s):
    Postfix (PID 28481)
[INFO] I found the following pop3 server(s):
    Dovecot (PID 18531)
[INFO] I found the following imap server(s):
    Dovecot (PID 18531)
[WARN] I could not determine which ftp server is running.

##### LISTENING PORTS #####
(only        ()
Local        (Address)
[localhost]:10023        (3297/postgrey)
[localhost]:10024        (3906/amavisd-new)
[localhost]:11211        (11890/memcached)
[anywhere]:587        (28481/master)
[anywhere]:110        (18531/dovecot)
[anywhere]:143        (18531/dovecot)
[anywhere]:465        (28481/master)
[anywhere]:22        (785/sshd)
[anywhere]:25        (28481/master)
*:*:*:*::*:10023        (3297/postgrey)
*:*:*:*::*:10024        (3906/amavisd-new)
*:*:*:*::*:3306        (28759/mysqld)
*:*:*:*::*:587        (28481/master)
[localhost]10        (18531/dovecot)
[localhost]43        (18531/dovecot)
*:*:*:*::*:80        (1337/apache2)
*:*:*:*::*:465        (28481/master)
*:*:*:*::*:22        (785/sshd)
*:*:*:*::*:25        (28481/master)
*:*:*:*::*:443        (1337/apache2)




##### IPTABLES #####
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination   

Following the step-by-step instructions "The Perfect Server - Debian 9 (Stretch) with Apache, BIND, Dovecot, PureFTPD and ISPConfig 3.1"

Executing point 11 (page 2)

Code:

Installing Python packages...
Had a problem while installing Python packages.

pip prints the following errors:
=====================================================
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.

Should I update Python now and if yes, how?

 

No.
I think that warning comes from PIP, not Debian. Let's Encrypt folks need to update their certbot to use Python 3 before January 1st, 2020.
Your Debian already has Python 3.x, it's just that so many utilities still use Python 2 that Debian has been forced to include also Python 2.7 for them.

 

I read from https://certbot.eff.org/lets-encrypt/debianstretch-apache
that for Apache and Debian 9 Stretch:

Should the Perfect Server Guide for Stretch reflect this?

 

Looks like Debian project is working on this, and Stretch gets updated certbot soonish.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=919933#28

 

Till, thanks a lot. To be sure, I will start from scratch.

I would like to recommend you something for your step-by-step instruction. Which would have helped me a lot.
A lot of people are dealing with

Code:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

because there computer is set in another language which SSH forwards to and tries to use on the server, but the server doesn't have it installed yet.

So I did several things:
1. Comment out "SendEnv LANG LC" in the ssh_config on my computer

Code:

nano /etc/ssh/ssh_config

2. installed the language from the computer on the server (in my case German) and afterwards a reboot.

Code:

locale-gen
reboot

Now the perl messages are gone for good. And still I don't feel sure with it. Please let me know, if there is a smoother way

 

Now I retried again and the perl message kept apearing.
Now I did that:

Code:

Localhostfehler beheben:
export LANGUAGE=en_US.UTF-8
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
locale-gen en_US.UTF-8
dpkg-reconfigure locales
de & us auswählen
reboot

and now the perl messages are no more apearing