How to install Plesk on Ubuntu 16.04 - installation

Question

I am getting this error on my Ubuntu 16.04 LTS system :
The following packages have unmet dependencies:
plesk-php56-snmp : Depends: libsnmp30 (>= 5.7.3+dfsg-1ubuntu4.1~dfsg) but 5.7.3+dfsg-1ubuntu4 is to be installed
plesk-php70-snmp : Depends: libsnmp30 (>= 5.7.3+dfsg-1ubuntu4.1~dfsg) but 5.7.3+dfsg-1ubuntu4 is to be installed
plesk-php71-snmp : Depends: libsnmp30 (>= 5.7.3+dfsg-1ubuntu4.1~dfsg) but 5.7.3+dfsg-1ubuntu4 is to be installed
plesk-php72-snmp : Depends: libsnmp30 (>= 5.7.3+dfsg-1ubuntu4.1~dfsg) but 5.7.3+dfsg-1ubuntu4 is to be installed
output of lsb_release -a :
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial
I tried a lot of things , installed a lot of packages, stopped some services but can't resolve.
I have 3 domains and will add some more too , so I want to use plesk for easy configurations, but can't install.
How can I install plesk on my system?

Answer 1

It seems that you encountered system repositories misconfiguration.
Plesk requires that the system repositories were enabled.
For experiment sake I installed OS from official ubuntu-16.04.3-server-amd64.iso with default settings (just enter-enter-enter):
# cat /etc/*release | grep VERSION
VERSION="16.04.3 LTS (Xenial Xerus)"
VERSION_ID="16.04"
VERSION_CODENAME=xenial
Then Plesk Onyx 17.8 (which is currently default) using one-click installer.
Installation went successfully.
I can see, that mentioned packages depends on libsnmp30, but not the specific version:
# apt-cache depends plesk-php56-snmp
plesk-php56-snmp
Depends: libc6
Depends: libsnmp30
Depends: plesk-php56
However, the version which you were missing was already installed:
# dpkg -l | grep libsnmp30
ii libsnmp30:amd64 5.7.3+dfsg-1ubuntu4.1 amd64 SNMP (Simple Network Management Protocol) library
It comes from xenial-updates main repository, which is enabled by default:
# apt-cache showpkg libsnmp30 | grep 4.1 | grep binary-amd64
5.7.3+dfsg-1ubuntu4.1 (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_binary-amd64_Packages) (/var/lib/dpkg/status)
Just in case, here is my sources.list:
# cat /etc/apt/sources.list | grep -v "^#"
deb http://us.archive.ubuntu.com/ubuntu/ xenial main restricted
deb http://us.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb http://us.archive.ubuntu.com/ubuntu/ xenial universe
deb http://us.archive.ubuntu.com/ubuntu/ xenial-updates universe
deb http://us.archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://us.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb http://us.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu xenial-security main restricted
deb http://security.ubuntu.com/ubuntu xenial-security universe
deb http://security.ubuntu.com/ubuntu xenial-security multiverse

Answer 2

i am not sure why this happens but its definitely sure you need to install libsnmp30 dependency try this one
sudo apt-get install snmpd libsnmp30 libsnmp-base
or this one If that still gives you errors and prevents installation (though, it doesn't look like it should that appears to be a different problem) try this:
sudo apt-get install snmpd libsnmp30 libsnmp-base linux-image-generic linux-image-3.13.0-40-generic linux-image-extra-3.13.0-40-generic

Answer 3

I got the problem at the end, it's all about my version : it was 16.04.3 , not 16.04
So , i had to reinstall operating system, changed operating system to 16.04 LTS (not 16.04.3 ) , and now I able to install Plesk.
It means , Plesk Supports only 16.04 solely , don't waste your time if you use another version of 16.04 , look for another control panel or change your operating system, there is no other way i think.
I wish it helps someone who will waste time cause of this simple information..
EDIT :
#Elvis Plesky answered the question, I think so Plesk supports minor versions. Maybe my configurations were incorrect , I don't know, because already reinstalled OS.
Maybe it is about 'systemd' thing that I found on Plesk documentation :
Plesk only supports Debian 8 and Ubuntu 16.04 servers running the
‘systemd’ init system. Compatibility with ‘sysvinit’ has not been
tested and is not guaranteed.
I am not an experienced user so don't understand what is it about..