Install Proxmox VE 6 on Debian 10 (Buster)

Proxmox Virtual Environment (VE) is an enterprise-grade open-source server virtualization solution based on Debian Linux distribution with a modified Ubuntu LTS kernel. It allows you to deploy and manage both virtual machines and containers.

This setup presumes you have a running Debian 10 Buster Linux server running. If you don’t have one, follow our guide to Install Debian 10 on a dedicated server that will be used as a hypervisor. Please note that you need a 64-bit processor with support for the Intel 64 or AMD64 CPU extensions.

Below are the steps you’ll follow through to install Proxmox VE 6 on Debian 10 (Buster).

Step 1: Update Debian OS

Update apt package index before getting started.

sudo apt -y update
sudo apt -y upgrade
sudo reboot

Step 2: Set system hostname

We need to set the hostname and make sure it is resolvable via /etc/hosts.

sudo hostnamectl set-hostname prox6node01.example.com --static
echo "10.1.1.10 prox6node01.example.com prox6node01" | sudo tee -a /etc/hosts

example.com should be replaced with a valid domain name. Continue reading “Install Proxmox VE 6 on Debian 10 (Buster)” »

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Debian Wheezy repository

Debian wheezy is no longer supported. It is two major releases older than stable. It has not received any updates since 31 May 2018. The resolution is to dist-upgrade to oldstable, or to stable.

You can still use the archive repository but there is no more updates:

deb http://archive.debian.org/debian wheezy main
deb http://archive.debian.org/debian-archive/debian-security/ wheezy updates/main
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Set Up Apache Virtual Hosts on Debian 7

Step One— Create a New Directory

First, it is necessary to create a directory where we will keep the new website’s information. This location will be your Document Root in the Apache virtual configuration file. By adding a -p to the line of code, the command automatically generates all the parents for the new directory.

You will need to designate an actual DNS approved domain (or an IP address) to test that a virtual host is working. In this tutorial, we will use example.com as a placeholder for a correct domain name.

sudo mkdir -p /var/www/example.com/public_html

*If you want to use an unapproved domain name to test the process, you will find information on how to make it work on your local computer in Step Seven. Continue reading “Set Up Apache Virtual Hosts on Debian 7” »

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Install Percona XtraDB Cluster for MySQL 5.7 on Debian 8

First of all, why we choose three nodes and not only two? In any cluster, the number of nodes should be odd, so in the case of disconnection of a node, we assume that the highest group of servers has the fresh data, and should be replicated to the down node to avoid data loss. This is related only to resolve conflicts in data replication, we won’t loose data written only to the disconnected node.

This is used to avoid a circumstance called split brain, in which we can’t automatically choose which node has correct data. Think for example of a 2 node cluster where both nodes are disconnected from each other, and the same record is written to both nodes: who wins when they come back online? We don’t know, so split brain happens, and we have to manually decide wich record is the right one.

The number of nodes that is needed to determine wich part of the cluster has the right data is called QUORUM, in our case, the quorum will be 2. So we need 2 servers always be connected to each other. In case all three nodes will go down, we have a split brain and we must decide wich server should go in bootstrap mode manually, this is the procedure to determine wich will be the main server to resume from the split brain.

Configuring Percona XtraDB Cluster on Debian 8

This tutorial describes how to install and configure three Percona XtraDB Cluster nodes on Debian 8 servers, we will be using the packages from the Percona repositories.

Node 1
Hostname: mysql1.local.vm
IP address: 192.168.152.100
Node 2
Hostname: mysql2.local.vm
IP address: 192.168.152.110
Node 3
Hostname: mysql3.local.vm
IP address: 192.168.152.120

On each host, modify file /etc/hosts as follows to ensure DNS will work correctly. Continue reading “Install Percona XtraDB Cluster for MySQL 5.7 on Debian 8” »

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Varnish daemon not listening on configured port – Hack for Debian or Ubuntu

If you’re already troubled with varnish on changing listening ports from default. Here’s a little hack that worked on my Debian and Ubuntu distribution.

sudo apt remove varnish

sudo apt-get purge varnish

# I manually remove the 3 files in created in /etc/systemd/system/*

sudo apt install varnish
sudo nano /lib/systemd/system/varnish.service # put the rigth conf
sudo nano /etc/varnish/default.vcl #put the rigth conf
sudo systemctl daemon-reload
sudo service varnish restart

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Perfect FTP Server for Debian or Ubuntu

This installation was performed on a Ubuntu 14.04 distribution system.

While there are a variety of FTP server tools available for Linux, one of the most popular and mature options is vsftpd. Begin by SSHing into your server as root and use the apt-get command to install vsftpd:

apt-get update
apt-get install vsftpd
Reading package lists... Done
Building dependency tree
Reading state information... Done
[...]
The following NEW packages will be installed:
 vsftpd
0 upgraded, 1 newly installed, 0 to remove and 18 not upgraded.
Need to get 111 kB of archives.
After this operation, 361 kB of additional disk space will be used.
Get:1 http://mirrors.digitalocean.com/ubuntu/ trusty-updates/main vsftpd amd64 3.0.2-1ubuntu2.14.04.1 [111 kB]
Fetched 111 kB in 0s (231 kB/s)
Preconfiguring packages ...
Selecting previously unselected package vsftpd.
(Reading database ... 175600 files and directories currently installed.)
Preparing to unpack .../vsftpd_3.0.2-1ubuntu2.14.04.1_amd64.deb ...
Unpacking vsftpd (3.0.2-1ubuntu2.14.04.1) ...
Processing triggers for man-db (2.6.7.1-1) ...
Processing triggers for ureadahead (0.100.0-16) ...
Setting up vsftpd (3.0.2-1ubuntu2.14.04.1) ...
vsftpd start/running, process 18690
Processing triggers for ureadahead (0.100.0-16) ...

Configuration
The next step is to change any configuration settings for vsftpd. Open the /etc/vsftpd.conf file in your preferred text editor: Continue reading “Perfect FTP Server for Debian or Ubuntu” »

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Install Proxmox VE on Debian 9 – Stretch

The installation of a supported Proxmox VE server should be done via Bare-metal_ISO_Installer. In some case it makes sense to install Proxmox VE on top of a running Debian Stretch 64-bit, especially if you want a custom partition layout. For this HowTO the following Debian Stretch ISO was used:

Install a standard Debian Stretch (amd64)

Install a standard Debian Stretch, for details see Debian, and select a fixed IP. It is recommended to only install the “standard” package selection and nothing else, as Proxmox VE brings its own packages for qemu, lxc.

Add an /etc/hosts entry for your IP address
Please make sure that your hostname is resolvable via /etc/hosts, i.e you need an entry in /etc/hosts which assigns an IPv4 address to that hostname.

Note: Make sure that no IPv6 address for your hostname is specified in `/etc/hosts`

For instance if your IP address is 192.168.15.77, and your hostname prox4m1, then your /etc/hosts file should look like: Continue reading “Install Proxmox VE on Debian 9 – Stretch” »

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How to disable Network Manager on Linux

First Check if NetworkManager is running on Ubuntu / Debian

Usually you should be using NetworkManager by default (Ubuntu 14.04), just in case you want to be sure, use this command to verify:

dpkg --get-selections | grep network-manager

In case there is some output like:

network-manager install

it is installed, if there is nothing returned, you are probably using a different network managing daemon. It would be possible that network manager is installed but inactive. Lets check if its running the hard way:

ps aux | grep network-manager

If thats returning something different than itself, you can be sure using the NetworkManager in Ubuntu / Debian.

Disable Network Manager Completely

Here is how to disable Network Manager completely, so that Network Manager stops running on your Linux system.

To disable Network Manager on Debian 8 or later:

$ sudo systemctl stop NetworkManager.service
$ sudo systemctl disable NetworkManager.service

To disable Network Manager on Debian 7 or earlier:

$ sudo /etc/init.d/network-manager stop
$ sudo update-rc.d network-manager remove

To disable Network Manager on Ubuntu or Linux Mint: Continue reading “How to disable Network Manager on Linux” »

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Install Redis Server and PHP-Redis on Debian or Ubuntu System

you can install the phpredis extension from the Ubuntu respositories.

First, if you don’t have it installed already, let’s install Redis:

sudo apt-get install redis-server

After we get Redis installed (and/or verified that it was installed), we can install the PHP module for Redis:

sudo apt-get install php5-redis

After the module is done installing, you will want to restart your webserver and/or process manager (php-fpm, spawncgi, et cetera). Once you’ve restarted, you can check phpinfo() for a new section labeled Redis.

On Ubuntu 14.x System, you may try:

Install Redis 2.8.9

sudo apt-add-repository ppa:chris-lea/redis-server
sudo apt-get update
sudo apt-get install redis-server

Remove Redis 2.8.9

sudo apt-get purge--auto-remove redis-server
 

 

 

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